3 Mariners players who survived trade deadline, but will be gone by offseason

The Seattle Mariners were one of the big winners of the trade deadline, which saw them shore up their offense with Eugenio Suárez and Josh Naylor and their bullpen with Caleb Ferguson. And yet, just as notable as which players arrived is which ones didn't leave.

There were indeed some inevitable casualties of the new additions. The Mariners were able to temporarily clear a spot on the 26-man roster by putting Luke Raley on the injured list, but they had to serve harsher treatment to Collin Snider and Ben Williamson. The former got designated for assignment, while the latter was optioned to Triple-A Tacoma.

Though all the other incumbents got to stay put, their relief figures to be temporary. Whether their exit happens in the offseason or sometime before then, they're likely not long for Seattle.

3 Mariners who are on borrowed time on the Mariners' roster

Dylan Moore, INF/OF

It is frankly shocking that Moore is still a member of the Mariners on the other side of the trade deadline, and not just because they reportedly tried to market him as a trade chip.

We were totally prepared for the Mariners to part ways with Moore no matter what happened. He's had good times with the franchise since 2019, notably winning a Gold Glove last year and exiting this April with an OPS over .900. But he has quite literally stopped hitting over the last two months, producing 33 strikeouts and two hits in 58 at-bats since May 28.

It is not the least bit surprising that the Mariners couldn't find a taker for the 33-year-old Moore, and that they even tried felt like a precursor to him getting designated for assignment. Two hits in two months is never excusable, and Moore isn't even making up for it on defense. He's at -3 Outs Above Average for the year.

Moore getting DFA'd could still happen, in which case the Mariners could call on Samad Taylor or Leo Rivas to fill his spot on the bench. If not, well, this is his last year under contract anyway.

Donovan Solano, 1B

Even more so than Moore, it feels like Solano has had nine lives as a roster mainstay in 2025.

Mariners fans were calling for him to get DFA'd as he got off to a dreadfully slow start in April and May, hitting just .138 with two walks through 30 games. He managed to get warm after that, but has since gone cold again with a .186 average and three walks in 19 games since June 25. Overall, the 37-year-old has just a .626 OPS.

Yet even with Naylor at first base, Solano seems safe for now. This is partly owed to how the Suárez trade sent Tyler Locklear to Arizona, thus removing an alternative to fill Solano's spot as Dan Wilson's right-handed option for pinch-hitting appearances and platoon starts at first base and DH.

As with Moore, however, Solano shouldn't feel too confident that his spot on the roster will last throughout the rest of the year. He could be the one to go once Raley or Victor Robles comes off the injured list. If not, this is also his last (and only) year under contract.

Casey Legumina, RHP

We would have considered Trent Thornton for this spot a couple days ago, but not now that he's down for the rest of 2025 with a torn left Achilles.

Thornton may well have been the odd man out if the Mariners had followed up the Ferguson trade with a proper blockbuster for a reliever, but that unfortunately didn't happen. The club nonetheless figures to keep playing musical chairs with its middle relief corps, and nobody should be more worried about his spot than Legumina.

The 28-year-old might have been the next Paul Sewald for Seattle, but his 40 appearances have yielded an unwieldy 5.27 ERA. Whatever stretches of dominance he's had have tended to get rudely interrupted, as was the case in July when he gave up 13 runs in nine appearances.

Legumina does have a minor league option left, so he'd be easy to subtract from the roster if the Mariners decide to give, say, Troy Taylor a shot. And even if he does survive to the end of the season, he's not the kind of guy the team should be hell-bent on bringing back for 2026.