Mariners to trade for Jorge Polanco replacement: who could they target?

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The Seattle Mariners enter the offseason with a roster that still hums with young talent, but also a clear hole where veteran production once lived. After Jorge Polanco signed with the New York Mets, Seattle must decide whether to plug that gap with an experienced bat or stay patient while prospects debut.

Why Brendan Donovan is drawing trade buzz as a short-term fix

MLB.com reporter Mark Feinsand recently suggested a trade for St. Louis infielder Brendan Donovan as a sensible move for the Mariners. Donovan offers a mix of reliability and flexibility that matches Seattle’s current need.

  • Versatility: Donovan can play multiple infield spots and cover the outfield if needed.
  • Offensive track record: He owns a career batting average near .282 and posted .287 with 10 home runs in 2025.
  • Defensive chops: Donovan is an established glove winner with a Gold Glove on his résumé.
  • Control: He remains under club control for two seasons, which limits long-term commitment for Seattle.

How he would fit into the Mariners’ short-term plans

Seattle has several infield prospects on the verge of playing meaningful MLB innings. Names like Colt Emerson, Cole Young and Ben Williamson loom large in the organization’s depth chart.

  • Donovan’s left-handed swing would balance Seattle’s right-handed lineup pieces.
  • His ability to move around the diamond allows the club to ease prospects into everyday roles.
  • As a near-term solution, he could replace some of the run production lost when Polanco departed.

Room for both youth and a veteran bridge

Bringing in an experienced bat does not block younger players. Instead, it gives the Mariners flexibility.

  • Donovan could start while prospects acclimate to MLB pitching.
  • He can become a late-inning defensive substitute or serve as a primary everyday player.
  • His presence would reduce pressure on rookies thrust into high-leverage roles early.

Trade feasibility: what Seattle might pay

Donovan has been discussed as a trade candidate for a while. That history makes a deal more plausible. St. Louis would likely ask for a mix of prospects and MLB-ready depth.

  • Possible return: mid-tier prospects and organizational depth pieces.
  • Less likely: top-10 Mariners prospects such as Colt Emerson.
  • Salary implications are manageable because Donovan is controlled for two seasons.

How the move compares with other offseason options

Seattle could also address its lineup internally or via free agency. Options on the table include re-signing veterans, promoting from within, or making a splash trade. One wild card is Eugenio Suárez, who remains a free agent and could change roster needs if he signs elsewhere.

  • Internal promotion: accelerate prospects like Emerson to fill the void.
  • Free-agent signings: pursue short-term veterans to stabilize the lineup.
  • Trades: target controllable, versatile players like Donovan to bridge the gap.

Relevant roster context and Mariners priorities

General manager decisions will balance winning now with protecting future upside. Seattle’s organization is stocked with talent, but veteran leadership and left-handed offense are in short supply.

  • Prospect development remains a top priority.
  • Short-term competitiveness could justify adding a player with Donovan’s profile.
  • Any move must consider payroll, roster flexibility, and clubhouse chemistry.

Related MLB headlines Mariners fans are watching

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  • Yankees offseason plans shift after unexpected roster moves.
  • Hall of Fame voting trends spark debate around modern candidates.
  • Veteran stars express frustration as teams reshape rosters.

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