Mariners Seeking Right-Handed, Veteran First Baseman

It’s been a quiet offseason so far for the Mariners, who have yet to sign a free agent to a major league deal. They have been linked to trade candidates like Cody Bellinger, Alec Bohm, and Nico Hoerner, and are reportedly listening to offers for Luis Castillo, but president of baseball operations Jerry Dipoto came away from the Winter Meetings without pulling off any swaps either.

Still, the Mariners remain on the lookout for ways to improve an offense that finished 21st in runs scored in 2024. Reports surfaced at the beginning of the offseason that the club was looking for infield bats. Earlier this week, Dipoto confirmed that first, second, and third base are all areas of need (per Ryan Divish of The Seattle Times). As things stand, shortstop J.P. Crawford seems to be Seattle’s only infielder with a guaranteed everyday starting role.

According to Divish, the Mariners were aiming to check first base off their to-do list before the end of the Winter Meetings. They had previously expressed interest in both Carlos Santana and Justin Turner, and they were apparently willing to offer either veteran a one-year deal this week. Needless to say, neither fish was biting, but that doesn’t mean Dipoto has given up. On that note, Divish offered further insight into Seattle’s pursuit of Santana and Turner, reporting that the team is looking for an experienced hitter who can bat from the right side to split playing time with the lefty-batting Luke Raley. Raley hits well against righties but struggled badly in limited playing time against same-handed pitching in 2024. Turner has had neutral platoon splits throughout his career, and the switch-hitting Santana has done his best work against southpaws. Either could make a productive platoon partner for Raley.

With that said, one has to wonder if the newly minted Gold Glove winner Santana would be willing to accept anything less than a full-time job at first base. He’s coming off his best season in five years and might not be interested in a role that would involve splitting playing time. Turner, on the other hand, thrived in a first base/DH role for Seattle down the stretch in 2024. He has also made it clear that he’d be happy to return to the M’s. At the end of the regular season, he told Daniel Kramer of MLB.com in no uncertain terms, “I would love to be back and be a Mariner.”

Then again, if Santana can be persuaded to sign in Seattle, he might be the more impactful player. Thanks to his strong defense, he has outproduced Turner over the past two years according to every version of Wins Above Replacement. He’s also a year and a half younger than Turner, who turned 40 in November. To that point, Divish suggested the Mariners might be leaning toward Santana in a recent appearance on the “Daily Puck Drop” podcast, saying he believes Santana is their “priority” right now at first base.

Speaking of righty-batting, veteran first basemen, the Mariners have also expressed interest in Christian Walker. Kramer reports the team has had “conversations” about signing Walker, though he notes the three-time Gold Glove winner is probably out of their price range. Indeed, Divish suggests the Mariners have approximately $15MM to $17MM left to spend this winter, barring any trades to cut payroll. Given the fact that Walker turned down the one-year, $21.05 million qualifying offer, he is surely looking for a contract worth more than $17MM per year. MLBTR predicted a three-year, $60MM deal for Walker on our Top 50 Free Agents list. While he could be a far more valuable addition than either Santana or Turner, that value will be reflected in his asking price.

It’s also worth pointing out that a player like Walker certainly isn’t going to split playing time with Raley. He is going to be the everyday first baseman wherever he signs. Thus, if the Mariners were to sign Walker, it would push Raley into the designated hitter role. That could be another reason the fit doesn’t make sense. Alternatively, perhaps Dipoto could package the talented and cost-controlled Raley with one of his higher-priced veterans (such as Mitch Haniger or Mitch Garver) as a way to get another team to take on one of his desirable contracts. If he could pull off such a move, perhaps he could free up enough payroll to sign Walker without going over budget.