3 trade proposals if the Mariners decide to move on from Randy Arozarena

On paper at least, the last thing the Seattle Mariners should be thinking about is intentionally subtracting a big bat from their offense this winter. After all, they already stand to lose Josh Naylor, Eugenio Suárez and Jorge Polanco to free agency.

And yet, you could see speculation over Randy Arozarena's future with the Mariners coming a mile away. Now it's here, with Daniel Kramer of MLB.com writing on October 22 that the two-time All-Star left fielder is one of two players the Mariners might be willing to trade this winter.

The other is Luis Castillo, who will be the harder of the two to move. His $24.15 million salaries for the next two seasons are a bit heavy for a declining pitcher, whereas Arozarena is in his prime and projected by MLB Trade Rumors to make $18.2 million next year. He doesn't have a no-trade clause, whereas Castillo does.

Arozarena also strikes a better balance between valuable, yet also expendable. He has produced a solid 4.9 rWAR in his 219 games as a Mariner, but he really went missing in the last three months of 2025. He had an .823 OPS through July, followed by a .680 OPS in August, a .596 OPS in September and a .574 OPS in the playoffs in October.

Next year will be Arozarena's last before free agency, and the reality is that he doesn't have a ton of surplus value — just $2.1 million, according to Baseball Trade Values — beyond what he'll be paid in 2026. As such, the Mariners probably can't hope to offload him and get good value back in return without also taking on some dead money from another team.

Even so, there may be a chance to make a trade in which the team clears more money for an already ample offseason budget, gets instant impact for 2026 and also some future value in the form of a talented prospect. And it is with this in mind that we present the following trade proposals.

3 trade proposals for the Mariners if they decide to move on from Randy Arozarena

San Diego Padres

Trade Proposal: Padres get LF Randy Arozarena; Mariners get LHP Wandy Peralta, RHP Miguel Mendez

The Padres only got a .697 OPS and -0.1 rWAR from their left fielders this year. They do hold a $6.5 million club option on Ramón Laureano, but a trade for Arozarena would bring more power upside to an offense that produced only 152 home runs this season.

The Mariners need a second lefty in their bullpen to help out Gabe Speier, and Peralta would be a reliable option. This is assuming he picks up his $4.25 million player option, in which case the Mariners would get roughly $14 million in savings from this deal.

The real prize would be Mendez, who MLB Pipeline has ranked as San Diego's No. 4 prospect. He has a plus fastball and slider and is already making strides with his control, as he cut his walk rate from 6.1 per nine innings to 4.3 per nine innings from 2024 to 2025. He could be ready to contribute next year after making it to Double-A this season.

Philadelphia Phillies

Trade Proposal: Phillies get LF Randy Arozarena; Mariners get LHP José Alvarado, RHP Gage Wood

The Phillies didn't do much better than the Padres in left field this year, posting 0.6 rWAR and a .667 OPS. Their outfield in general has been a weakness for several seasons, and rumors surrounding Nick Castellanos hint that a major makeover is coming.

Though the Mariners should want nothing to do with Castellanos, Alvarado is another viable option to be the second lefty in the bullpen. A suspension and a forearm injury effectively derailed his 2025 season, but his $9 million club option shouldn't be deemed an outrageous expense. He has closer-caliber stuff when he's right, and would frankly be overqualified as a second lefty.

Once again, though, the prospect would be the real prize for Seattle. The Phillies only just drafted Wood in the first round in July, and he already ranks as the No. 4 talent in their system. He boasts a 70-grade fastball and 55-grade control, though he is a project who likely won't be ready until 2028.

Los Angeles Dodgers

Trade Proposal: Dodgers get LF Randy Arozarena; Seattle Mariners get RHP Blake Treinen, RHP Patrick Copen

The Dodgers signed Michael Conforto in hopes that he would stabilize left field, but he was instead the main offender in an output of -0.3 rWAR. So even if the Dodgers do make good on threats to sign Kyle Tucker to patrol right field, they'll also need a new regular on the other side of the outfield.

As the Dodgers also need to fix their bullpen, they probably wouldn't balk at subtracting Treinen after he struggled with a 5.40 ERA this year. The Mariners could take on his $13.5 million salary in hopes that he can still pitch like the guy who's had multiple seasons with a sub-2.00 ERA.

For his part, Copen is the kind of pitcher who belongs in the Mariners organization. He's a 6-foot-6, 220-pounder with a 70-grade fastball and 60-grade slider. His control is where he needs work, and the Mariners have a reputation for knowing what to do there.