Mariners Sign Naylor to Five-Year Deal, Offseason Starts Now

UPDATE: The Seattle Mariners have made a significant move to kick off the 2025-26 MLB offseason by re-signing first baseman Josh Naylor to a five-year contract. This deal marks the first major signing of the winter, solidifying Naylor’s role with the team after a standout performance last season.

Naylor’s return comes as the Mariners aim for a World Series title in 2026, following their heartbreaking exit in Game 7 of the ALCS last season. The Mariners’ front office had made it clear that retaining Naylor was their top priority, and they have fulfilled that commitment with this new contract, pending a physical.

Last season, Naylor proved to be a crucial asset for the Mariners, hitting .299/.341/.490 with nine home runs and 33 RBIs across 54 games, contributing significantly to a 2.2 WAR. His overall performance for the year, including his time with the Diamondbacks, culminated in a solid .295/.353/.462 batting line with 20 home runs.

The Mariners have struggled to find a reliable first baseman for nearly two decades, dating back to the trade of John Olerud in 2004. Naylor’s signing is a step towards addressing this long-standing issue, especially given his impressive track record at T-Mobile Park, where he has slashed .304 with a slugging percentage of .534 in 43 career games.

Naylor is known for his high-contact ability, ranking 17th among qualified hitters in strikeout rate in 2025. While he may not fit the typical mold of a speedster, he showcased remarkable efficiency on the bases, successfully stealing 30 bases in 32 attempts last season, including an unblemished 19-for-19 after joining the Mariners.

As the offseason unfolds, fans and analysts alike will be watching closely to see how this signing shapes the Mariners’ future. The team is clearly positioning itself for a competitive next season, and Naylor’s presence in the lineup is a promising sign.

Check back for the latest updates and analysis as the offseason progresses. This story will be continually updated with further developments, including other potential signings and trades as they happen. Stay tuned for comprehensive coverage throughout the winter and into spring training.