Analysis: Two Mariners Trade Packages That Could Solve Third Base Problem
The Mariners have the pitching depth to make a splash this offseason, and Cubs infielder Matt Shaw could be the answer to their third-base problem. But would Seattle be willing to part with George Kirby or Emerson Hancock to land its third baseman of the future?
After missing the playoffs, the Seattle Mariners will look to make difference-making changes to their roster this offseason. Despite the turbulence of firing their manager and the looming possibility of an MLB lockout, Jerry Dipoto and company know the roster needs to improve.
Among their most glaring needs, the M's have to figure out a long-term solution at third base. The projected starter at the hot corner is Brendan Donovan, who, while capable of playing the position, is likely better suited for an outfield role.
With slugger Randy Arozarena potentially departing in free agency, Donovan could slot in as the Mariners' starting left fielder to open the 2027 season.
In 307 1/3 innings at third base in 2026, Donovan posted minus-4 Defensive Runs Saved (DRS) and minus-3 Outs Above Average (OAA). Seattle needs a defensive upgrade at the position to improve a unit that ranked among the bottom five teams in baseball by several defensive metrics.
Looking at Seattle's third base dilemma, one veteran could potentially be acquired that would help provide some stability and long-term upside at the hot corner:
The Player
Enter Chicago Cubs utility man Matt Shaw.
Shaw played just 55 innings at third base in 2026, but he logged 1,010 innings at the hot corner in 2025, registering 12 DRS and minus-1 OAA.
While he may never develop into a Gold Glove-caliber defender, Shaw projects as an average to above-average third baseman, which would represent a substantial upgrade over the production Seattle received at the position in 2026.
Beyond the potential defensive improvement, Shaw would also bring better balance to the lineup.
