Jerry Dipoto was hired to be Seattle’s general manager on September 28, 2015. His first major move was claiming Cody Martin off waivers from Oakland on October 19th. Four days later, he hired Scott Servais to be his manager. From there, we were off and running in the Jerry Dipoto Era.
He made a lot of moves in the ol’ transactions wire, both large and small. I tried to pull most of the ones relevant to the 2016 Mariners’ Major League ballclub. For the purposes of this post, I’m going to go ahead and rank his moves from most impactful to least, with commentary on each. At the very bottom of the post, I’ll throw in a section with just the transactions in chronological order, so you can see them all lined up in a neat little pile.
Also, if you want to know my overall thoughts on Dipoto’s first year as the GM of the Mariners, you’ll find my closing arguments at the bottom (just before the chronological list of important transactions). This post has TL;DR written all over it!
12/2/15 – Baltimore Orioles traded C Steve Clevenger to Seattle Mariners for RF Mark Trumbo and LHP C.J. Riefenhauser.
This one feels like cheating, but I’m still putting this at #1 because it’s so laughably lopsided against the Mariners, it harkens back to the Bill Bavasi glory days. Trumbo was an All Star outfielder on a wild card team who hit 47 homers, 108 RBI, and all around had his best season ever. Granted, the same problems were still there – a low batting average, a not-great on-base percentage, a shit-ton of strikeouts – but if you’re just talking about the right-handed half of a corner outfield platoon, making just a hair over $9 million, would you rather have his massive bat or Franklin Gutierrez making $2.5 million? I know we love Guti and all of that, but his defense isn’t all that much better than Trumbo’s, and there’s no comparing the hitting numbers. Even in a very minor role, Guti still had a down year by his standards. And, of course, who can forget what we got back in return? Aside from salary saved (that, as far as I can tell, ended up going to Joaquin Benoit, so *fart noise*), we got a left-handed backup catcher in Steve Clevenger who hardly ever played, then broke a bone in his hand, then said a bunch of racist shit on Twitter, then was suspended for the rest of the year, before ultimately (I’m assuming) being released. On top of ALL of that, this trade had a direct impact on the standings. The Orioles probably would’ve made a different move to acquire a power bat, but it almost certainly wouldn’t have been as good. And, we ended up finishing 3 games behind Baltimore in the wild card. So, we sent what would become their very best power bat and run producer to our direct rival, who snatched up the final A.L. playoff spot by just a handful of games. Inauspicious start to say the least.
11/16/15 – Texas Rangers traded CF Leonys Martin and RHP Anthony Bass to Seattle Mariners for RHP Tom Wilhelmsen, CF James Jones and PTBNL (3B Patrick Kivlehan).
Let’s follow that turd sandwich with the opposite of that (vagina pizza?). The Rangers ended up signing Ian Desmond on a 1-year, $8 million deal later on in the offseason (leaving me to wonder why we just didn’t fucking do that, but whatever), so I don’t totally understand why they were so keen to let Leonys Martin go, but obviously they didn’t see him in their future plans. Martin ended up starting for us from day 1, playing a superb centerfield, and even blowing away his season high for homers with 15. All in all, he was slightly better than we thought he’d be, with two more years of Arbitration to go. While he’ll never be a superstar, he’s a solid offensive piece and an elite defensive talent. The fact that we ended up getting back 2/3 of this trade for nothing later in the season is the hilarious part, along with the fact that Wilhelmsen was a dumpster fire while wearing a Rangers uniform (and sort of his usual okay self when the alleged double-agent returned to Seattle), and the fact that James Jones is who we thought he was. We essentially gave the Rangers nothing and got a starting centerfielder for a minimum of 3 years in return. Not too shabby.
12/18/15 – Seattle Mariners signed free agent RHP Hisashi Iwakuma.
We all know the story of how the Mariners got Iwakuma back in the fold, but if you don’t know, go here and read this. What I will say is, to anyone making any sort of argument that the Mariners’ cost-cutting measures helped pave the way for Kuma’s return, you can go fuck yourself, because you’re full of shit. Those moves were made well before we got Kuma back, and were under the assumption that he was going to go elsewhere for a higher guaranteed contract than we were willing to pay. The owners, to their credit, opted to make room in the budget to bring him back when the opportunity presented itself, and it paid off pretty well, all things considered. Without Kuma, things could’ve been A LOT worse (I don’t know if I made that point well enough in that linked post up there, but it’s true; the AAA starting prospects were pretty shabby).
12/14/15 – Seattle Mariners signed free agent RHP Steve Cishek.
Two years, $10 million, plus incentives. He secured 25 saves and blew 7 of them. That’s a lot of blown saves in what amounted to a little over half a season’s worth of closing ballgames, particularly for a team that finished 3 games out of the wild card. Overall, his numbers actually look pretty good on the season, and at times he approached the level of dominance he once had back in 2013. But, a career-high 8 homers allowed really did him in. He was pretty dominant against righties, but lefties hit 5 of those 8 homers, in significantly fewer plate appearances. With him losing his job to Edwin Diaz the way he did, he projects to be an 8th inning set up man in 2017, with an outside chance of regaining his closer’s job should Diaz falter in his Sophomore season.
12/9/15 – Milwaukee Brewers traded 1B Adam Lind to Seattle Mariners for RHP Carlos Herrera, RHP Daniel Missaki and RHP Freddy Peralta.
Meet Adam Lind, your left-handed first baseman platoon partner. He had a few memorable late-game hits (walk-offs and whatnot), but for the most part Lind was a huge disappointment. His numbers took a significant dive compared to his career norms, and they never really recovered the way we all hoped. He was essentially a replacement-level player making $8 million. On the plus side, we likely didn’t give up anyone special to get him, but suffice it to say, first base is the hole that can never be filled.
7/31/16 – Seattle Mariners traded LHP Wade Miley to Baltimore Orioles for LHP Ariel Miranda.
12/7/15 – Boston Red Sox traded RHP Jonathan Aro and LHP Wade Miley to Seattle Mariners for RHP Carson Smith and LHP Roenis Elias.
Ahh, the Miley deals. I ranked the deal sending him away higher than the deal bringing him in for a couple reasons. For starters, while he spent more time in Seattle doing everything he could to ruin our playoff chances, we were able to deal him to our main rival in Baltimore, where he proceeded to do everything he could to ruin their playoff chances. We were able to dump salary (and increase theirs), while at the same time getting in return a potential future starter, at a minimum salary, with many years of club control. On the flipside, those Red Sox really swindled us good! Though, it had no effect on the 2016 season, as neither Smith nor Elias hardly played at all due to injuries/ineffectiveness. The decider could be Jonathan Aro – who made all of one appearance with the big league ballclub – but I’d put my money on Carson Smith returning at some point and being a dominant late-game reliever.
11/5/15 – Seattle Mariners traded SS Brad Miller, 1B Logan Morrison and RHP Danny Farquhar to Tampa Bay Rays for RHP Nathan Karns, LHP C.J. Riefenhauser and CF Boog Powell.
I downgraded this move mostly for the incomplete/unknown nature of the various players involved. I will say that Brad Miller ended up hitting 30 homers for Tampa, and playing a decent number of games at first base, leading me to wonder what could have been had we held onto him and Trumbo and either platooned them both at first, or at various positions around the field. Miller’s overall batting numbers are nothing to write home about, but those homers would’ve looked awfully nice in a Seattle uniform. In return, we got about half a season out of Karns, who was mostly mediocre. He’s still a starter with lots of club control, but now he’s injured, and I’d say no news is bad news when it comes to his injury, as it doesn’t appear he’s anywhere close to returning to action. And, if he does, will he ever make good on his promise? I’m starting to have my doubts. The one saving grace might be Boog Powell, but he spent most of 2016 suspended for ‘roids or some damn thing. Besides, at best he appears to be a 4th outfielder, so all in all, I’d say this is another major trade we got killed in. It particularly hurts because Brad Miller is cheap, versatile, with lots of club control, and we essentially got back nothing in return.
12/3/15 – Seattle Mariners signed free agent LF Norichika Aoki.
Aoki signed a 2-year deal, but only 2016 was guaranteed. His 2017 option would’ve vested at 480 plate appearances, but he only managed 467. He ended up earning just shy of $6 million this year, but lost out on $6 million next year by 13 PA’s. He likely would’ve had a lot less, but he ended the last two months absolutely on FIRE at the plate, and we couldn’t sit him. Even with his finish, I’d say he was a net-negative for this team, considering his defense was pretty galling, and his base running was even worse. The team already has Seth Smith under club control next year, so I can’t imagine we bring Aoki back unless we deal Smith first. File this under: Eh, It Was Worth A Shot.
3/30/16 – San Diego Padres traded RHP Nick Vincent to Seattle Mariners for PTBNL.
Faced with a bevy of bullpen injuries in Spring Training, this was an underrated move just before the regular season that ended up paying off. Until it stopped paying off, like a hot black jack table with a new dealer. All in all, Nick Vincent was a fine reliever in 2016, but he was savagely over-used, and I can’t really blame Servais for it either, because he didn’t really have a whole lotta options in the first half of the season. It wasn’t until Dipoto made all of his summer deals when the Mariners could finally cobble together a workable bullpen. By that point, injuries (directly attributed to said overuse) piled up on Vincent, sending him on a DL stint. He did return, and was okay, but by that point he was behind a number of superior relievers, which was appropriate. Vincent should be nobody’s 8th inning guy. Save him for the blowouts and the extra innings affairs and you’ll be in better shape.
11/23/15 – Seattle Mariners signed free agent C Chris Iannetta.
He started off hot in April, cooled off in May, and I contend he ended up losing his starter’s job because the team overused him (though, this time I DO blame Servais). We brought Clevenger in here in that ill-fated Trumbo deal, so why didn’t we use him more? Was he REALLY that terrible? If so, why bring him in in the first place? Seems to me they made a snap judgment in Spring Training, refused to give Clevenger a consistent chance, even though when he did start, he looked pretty okay. Iannetta, on the other hand, proved to be a pretty big disaster defensively, and his power was drained to zero by the second half of the season. Now, it’s neither here nor there that Clevenger ended up breaking his hand, opening the door for Mike Zunino’s triumphant return. All I know is Iannetta is under contract at over $4 million next year, and he figures to be this team’s backup catcher. Not ideal use of funds.
2/3/16 – Seattle Mariners signed free agent 1B Dae-ho Lee to a minor league contract and invited him to spring training.
Oh how I love Dae-ho Lee, let me count the ways! He started the season by knocking Jesus Montero off the roster, which is always nice. He secured the right-handed platoon of first base, and ended up by and large outplaying Adam Lind. On top of that, some early heroics endeared him to the fanbase for all eternity. But, he did cool off considerably as the season went along, and with that his playing opportunities dwindled. He spent some time in Tacoma, to regain his swing, but never really made much of an impact in the stretch run. His defense was a pleasant surprise, and his ability to go the other way kept opposing defenses honest. Then again, his base running was predictably bad. But, he was cheap, earning just $1 million, while being worth every penny. Word is the team wants him back for 2017, and I don’t blame ’em! I’d like to see him back as well! I don’t know if he’ll ever be an everyday starter, but I’m curious to see how his game will grow now that he’s got a season’s worth of experience in the Majors.
11/11/15 – Seattle Mariners signed free agent RF Franklin Gutierrez.
As noted above in the Trumbo section, this turned out to be less than ideal. Complain all you want about there not being any right handed power bats on the market, but we fucking gave one away in Trumbo! The plus side on Guti is that he’s cheaper, he’s well-liked in the clubhouse, and he doesn’t need to or even want to play everyday. He’ll always be as prepared as can be in a pinch, so that’s not something to worry about. But, in the end, he’s another year older, and his body has been ravaged by injuries and illnesses over the years. His defense has taken a huge step back, and I don’t think any part of his game is ever going to get better; it can, indeed, only get worse. Sounds like the team wants him back too, but I think that’s a mistake.
7/20/16 – Seattle Mariners traded RHP Jordan Pries and LHP Mike Montgomery to Chicago Cubs for 1B Dan Vogelbach and RHP Paul Blackburn.
Oh what could’ve been with Mike Montgomery. As I’ve written about repeatedly, this was a deal made to sell high on an iffy bullpen piece, for hopefully a future starter at first base. Montgomery proved with his ongoing stint with the Cubs that he’s here to stay, and this one might end up backfiring even more depending on how long and impressive his Major League career ends up being. Shades of Matt Thornton, if you ask me. In return, Dan Vogelbach, who got a cup of coffee with the Mariners, but still looks pretty raw. He figures to get a shot in Spring Training (at least in a platoon role), but I have serious doubts. If anything, he probably figures to be a placeholder until one of our other impressive first base prospects is ready to make the jump. Don’t be shocked if, come June 2017, D.J. Peterson has supplanted Vogelbach (that is, assuming we don’t go out on the open market to bring in a veteran).
7/26/16 – Toronto Blue Jays traded RHP Drew Storen and cash to Seattle Mariners for RHP Joaquin Benoit.
11/12/15 – San Diego Padres traded RHP Joaquin Benoit to Seattle Mariners for RHP Enyel De Los Santos and SS Nelson Ward.
The Joaquin Benoit deals! He cost upwards of $8 million this year, and he ended up being a total dud, first hitting the DL for a protracted injury, then being a lump of crap upon his return. Makes you wonder how he was ever good in the first place, but then he went to Toronto and pitched lights out the rest of the year. Hence why that deal is ranked higher. I don’t think we gave up much of anything to get him (seemed like a cost-cutting move by the Padres, if anything), but we did end up getting back an interesting piece in Drew Storen. One of those Change of Scenery deals that ACTUALLY works, as Storen was MUCH better as a member of the Mariners than he was in a Blue Jays uni. Of course, this move helped/hurt both teams, as Toronto was the other wild card team that had us by 3 games by season’s end. They got the better of us ever-so-slightly, as Benoit proved to be the healthier option than Storen, and the more important piece to their bullpen than Storen was to ours. Both are UFA’s this year, and neither figures to make a substantial salary; I could easily see Storen returning to Seattle if the price is right.
2/9/16 – Seattle Mariners signed free agent RHP Joel Peralta to a minor league contract and invited him to spring training.
6/22/16 – Seattle Mariners signed free agent Tom Wilhelmsen.
12/8/15 – Oakland Athletics traded RHP Evan Scribner to Seattle Mariners for RHP Trey Cochran-Gill.
I’m going to start lumping a bunch of moves in, as I failed to anticipate how long this post would end up being. Peralta was a longtime vet brought in on an invite to Spring Training. He ended up winning a job in our bullpen thanks to lots of injuries ahead of him. He was also pretty okay in March, but it would not last long. We ended up designating him for assignment in June, after it was clear his Major League career was done. Similarly, Tom Wilhelmsen – in on that Leonys Martin deal – had a hard luck stint with the Rangers. They’d finally had enough of him by June, and we were more than happy to bring him back. A veteran, making the minimum, familiar with the organization, willing to go to Tacoma to work on some things, while at the same time able to fill in on Seattle’s bullpen that was sort of in shambles at this point of the season. Wilhelmsen ended up being who we thought he was, which is far from elite, but at the same time far from the waste of space he was for Texas. Scribner spent the bulk of 2016 on the DL. He returned in September and was FAR AND AWAY our best reliever in those 12 appearances, giving up 0 runs and only 5 hits in 14 innings. Where was THAT when we needed it April through August? He’s under club control for three more years, and if he pitches anywhere close to what he was in September, this trade with Oakland looks MUCH better than it already is.
6/22/16 – Toronto Blue Jays traded LHP Wade LeBlanc to Seattle Mariners for PTBNL.
One of these days, I’d like to write a book about Wade LeBlanc’s 2016 season, because something sure as shit doesn’t add up. We traded for him at probably our lowest point in the season (most likely for cash), and he was inserted into our rotation when most everyone else was injured. AND HE WAS ALL RIGHT! He didn’t turn the world on with his smile or anything, but he was somewhat competent! He had 5 quality starts out of 8, and he looked no worse than Ariel Miranda. Of course, there’s no point in having both Miranda and LeBlanc in your rotation at the same time, unless you’re just riddled with injuries, but who’s to say LeBlanc couldn’t have taken to a bullpen role? He sure as shit took to it with Pittsburgh, when we dealt him to the Pirates in September! He gave up 1 earned run in 12 innings with them! I hope that PTBNL we get back from the Pirates is something more than just the cash we gave away to the Blue Jays in June.
8/6/16 – Pittsburgh Pirates traded RHP Arquimedes Caminero to Seattle Mariners for PTBNL and Future Considerations (LHP Jake Brentz and RHP Pedro Vasquez).
10/19/15 – Seattle Mariners claimed Cody Martin off waivers from Oakland Athletics.
Caminero came to Seattle and tore the A.L. a new asshole with his 100mph fastball. Unfortunately, when teams started sitting dead red, and when he lost his command, they tore him a new asshole right back. You can’t help but be intrigued by a guy like that, and hopefully our coaches are able to work with him mechanically to help him reign in some of that explosiveness. Regardless, we’ve got 4 more years of club control on a guy with a ton of upside, so I like the move. As for Cody Martin, I don’t know what to tell you. He made a couple of spot starts for us, and a few more relief appearances, but other than mop up duty in extra innings games, he didn’t provide much of an impact. He started primarily with Tacoma, and he figures to do more of the same in 2017.
3/1/16 – Seattle Mariners signed free agent CF Guillermo Heredia.
8/31/16 – New York Yankees traded RF Ben Gamel to Seattle Mariners for RHP Jio Orozco and RHP Juan De Paula.
I honestly have no idea where Heredia came from, what he was doing for the entirety of the 2015 calendar year, or anything other than we signed him as a free agent out of Cuba. But, he tore through the minors and was called up to be primarily a defensive replacement in the outfield. He figures to compete with Ben Gamel, among other guys, to be one of this team’s reserve outfielders. Heredia bats righty and Gamel lefty, so it’s not like they’re in direct competition, but they sort of are, with Heredia on the inside track considering this organization’s lack of right handed bats. They’re both for the most part on the same level, talent-wise, with Heredia having the higher ceiling, and Gamel more likely to be Major League-ready. The 2017 outfield figures to be pretty jam-packed, with centerfield already on lockdown, so guys like Heredia and Gamel have a long way to go.
8/1/16 – Seattle Mariners claimed 1B Mike Freeman off waivers from Arizona Diamondbacks.
6/19/16 – Seattle Mariners traded SS Chris Taylor to Los Angeles Dodgers for RHP Zach Lee.
11/20/15 – Seattle Mariners traded CF Ramon Flores to Milwaukee Brewers for 2B Luis Sardinas.
The Mariners never really figured out their reserve infielder spot. Ultimately, Shawn O’Malley took the bull by the horns, but he’s not really much better than any of these guys listed here. Luis Sardinas had the first crack at the job, but quickly proved to be ineffective (ultimately traded away to San Diego in August). Chris Taylor had about the shortest opportunity I’ve ever seen, but in what I want to say was his only start with us this year, he had 2 errors and was sent away almost immediately afterward. He ended up predictably doing nothing for the Dodgers (after his leadoff triple with them right after the trade), so no big loss. Mike Freeman had some memorable plate appearances (particularly in that Anaheim series during Griffey weekend), and should be around to compete for the backup infielder spot next year.
3/17/16 – Seattle Mariners signed free agent RHP Steve Johnson to a minor league contract.
8/6/16 – Toronto Blue Jays traded LHP Pat Venditte to Seattle Mariners for PTBNL (2B Tim Lopes).
11/6/15 – Seattle Mariners claimed LF Daniel Robertson off waivers from Los Angeles Angels.
1/12/16 – Los Angeles Dodgers traded RHP Joe Wieland to Seattle Mariners for SS Erick Mejia.
These last deals aren’t really even worth mentioning, but I stuck them down here at the bottom anyway. Steve Johnson appeared in 16 games, almost exclusively as the very last man in the bullpen. When it became readily apparent he was a waste of space, we cut him loose in mid-June. Pat Venditte is the switch-pitcher we brought in, who got his cup of coffee with us in September, almost exclusively in blowout situations. I don’t know if he’ll ever be much more than a novelty. Robertson appeared in 9 games, and for the life of me, I can’t remember a thing about any of ’em. Apparently, they took place in July. He obviously didn’t make much of an impression, as he didn’t return in September with the rest of the call-ups. Finally, Joe Wieland appeared in one game, making a spot start on August 12th against the A’s. He gave up 6 runs in 5 innings, as we lost 6-3. We ended up trading him to the Braves in September, rendering him as little more than a trivia question answer, and not even an interesting one.
So, all in all, how would I rate Jerry Dipoto’s first year on the job? I’d say of all the moves I listed above, about half of them were good and half of them were bad. I would say the trades were particularly bad (including the Trumbo, Lind, 1st Miley, and Karns deals) with only the Leonys Martin deal having a real positive impact. He was able to find a lot of value towards the back-end of the roster, particularly the bullpen, as the season went along, and he was smart to fill the roster with veterans, considering the closing competitive windows of our aging stars. Ultimately, the Mariners improved by 10 games in his first year, so that’s certainly a feather in his cap. But, I think a lot of that was achieved by players already here. Cano having a bounce-back year, Seager improving, Zunino improving, Paxton making more of an impact, and so on and so forth.
What Dipoto needs to do now is find a way to fill some of these holes that are still dogging us. First base, short stop, corner outfield. He needs to find cost-effective ways to bolster our pitching staff. And, let’s face it, he needs a little luck to go his way. This team is close. So very close to making the post-season and breaking this streak. But, at the same time, it’s also pretty damn close from bottoming out yet again. Is Dipoto the man for the job? Time will tell, but I’m going to reserve any enthusiasm I have for the man until I see some actual results on the field.
It’s playoffs or bust, Jerry! You’ll get a “good job” out of me when I see some rings on the fingers of these players.
Important Mariners Transactions for the 2016 Season
- 10/19/15 – Seattle Mariners claimed Cody Martin off waivers from Oakland Athletics.
- 11/5/15 – Seattle Mariners traded SS Brad Miller, 1B Logan Morrison and RHP Danny Farquhar to Tampa Bay Rays for RHP Nathan Karns, LHP C.J. Riefenhauser and CF Boog Powell.
- 11/6/15 – Seattle Mariners claimed LF Daniel Robertson off waivers from Los Angeles Angels.
- 11/11/15 – Seattle Mariners signed free agent RF Franklin Gutierrez.
- 11/12/15 – San Diego Padres traded RHP Joaquin Benoit to Seattle Mariners for RHP Enyel De Los Santos and SS Nelson Ward.
- 11/16/15 – Texas Rangers traded CF Leonys Martin and RHP Anthony Bass to Seattle Mariners for RHP Tom Wilhelmsen, CF James Jones and PTBNL (3B Patrick Kivlehan).
- 11/20/15 – Seattle Mariners traded CF Ramon Flores to Milwaukee Brewers for 2B Luis Sardinas.
- 11/23/15 – Seattle Mariners signed free agent C Chris Iannetta.
- 12/2/15 – Baltimore Orioles traded C Steve Clevenger to Seattle Mariners for RF Mark Trumbo and LHP C.J. Riefenhauser.
- 12/2/15 – Seattle Mariners signed free agent RHP Justin De Fratus.
- 12/3/15 – Seattle Mariners signed free agent LF Norichika Aoki.
- 12/7/15 – Boston Red Sox traded RHP Jonathan Aro and LHP Wade Miley to Seattle Mariners for RHP Carson Smith and LHP Roenis Elias.
- 12/8/15 – Oakland Athletics traded RHP Evan Scribner to Seattle Mariners for RHP Trey Cochran-Gill.
- 12/9/15 – Milwaukee Brewers traded 1B Adam Lind to Seattle Mariners for RHP Carlos Herrera, RHP Daniel Missaki and RHP Freddy Peralta.
- 12/14/15 – Seattle Mariners signed free agent RHP Steve Cishek.
- 12/18/15 – Seattle Mariners signed free agent RHP Hisashi Iwakuma.
- 1/7/16 – Seattle Mariners released RHP Anthony Bass.
- 1/12/16 – Los Angeles Dodgers traded RHP Joe Wieland to Seattle Mariners for SS Erick Mejia.
- 2/3/16 – Seattle Mariners signed free agent 1B Dae-Ho Lee to a minor league contract and invited him to spring training.
- 2/9/16 – Seattle Mariners signed free agent RHP Joel Peralta to a minor league contract and invited him to spring training.
- 3/1/16 – Seattle Mariners signed free agent CF Guillermo Heredia.
- 3/17/16 – Seattle Mariners signed free agent RHP Steve Johnson to a minor league contract.
- 3/28/16 – Toronto Blue Jays claimed 1B Jesus Montero off waivers from Seattle Mariners.
- 3/30/16 – San Diego Padres traded RHP Nick Vincent to Seattle Mariners for PTBNL.
- 5/29/16 – Texas Rangers traded 3B Patrick Kivlehan to Seattle Mariners for PTBNL (RHP Justin De Fratus).
- 6/2/16 – Seattle Mariners designated RHP Joel Peralta for assignment.
- 6/17/16 – Seattle Mariners designated RHP Steve Johnson for assignment.
- 6/19/16 – Seattle Mariners traded SS Chris Taylor to Los Angeles Dodgers for RHP Zach Lee.
- 6/22/16 – Toronto Blue Jays traded LHP Wade LeBlanc to Seattle Mariners for PTBNL.
- 6/22/16 – Seattle Mariners signed free agent Tom Wilhelmsen.
- 7/20/16 – Seattle Mariners traded RHP Jordan Pries and LHP Mike Montgomery to Chicago Cubs for 1B Dan Vogelbach and RHP Paul Blackburn.
- 7/26/16 – Toronto Blue Jays traded RHP Drew Storen and cash to Seattle Mariners for RHP Joaquin Benoit.
- 7/31/16 – Seattle Mariners traded LHP Wade Miley to Baltimore Orioles for LHP Ariel Miranda.
- 8/1/16 – Seattle Mariners designated 3B Patrick Kivlehan for assignment.
- 8/1/16 – Seattle Mariners claimed 1B Mike Freeman off waivers from Arizona Diamondbacks.
- 8/6/16 – Toronto Blue Jays traded LHP Pat Venditte to Seattle Mariners for PTBNL (2B Tim Lopes).
- 8/6/16 – Pittsburgh Pirates traded RHP Arquimedes Caminero to Seattle Mariners for PTBNL and Future Considerations (LHP Jake Brentz and RHP Pedro Vasquez).
- 8/15/16 – Seattle Mariners sent Daniel Robertson outright to Tacoma Rainiers.
- 8/15/16 – Seattle Mariners traded 2B Luis Sardinas to San Diego Padres for Player To Be Named Later.
- 8/31/16 – New York Yankees traded RF Ben Gamel to Seattle Mariners for RHP Jio Orozco and RHP Juan De Paula.
- 9/13/16 Seattle Mariners traded LHP Wade LeBlanc to Pittsburgh Pirates for PTBNL.
- 9/14/16 Seattle Mariners traded RHP Joe Wieland to Atlanta Braves for PTBNL.