The Seattle Mariners are reportedly finalizing a five-year contract with Josh Naylor, keeping the first baseman in the Pacific Northwest through the 2030 season, ESPN’s Jeff Passan reported.

The 28-year-old was first acquired by the Mariners in a July 24 trade with the Arizona Diamondbacks, exceeding expectations as a foundational contributor throughout Seattle’s playoff push. Naylor’s sensational stretch upon his arrival endeared himself to a fanbase that saw the Mariners go deeper into the postseason than ever before, falling in Game 7 of the American League Championship Series (ALCS).

In 54 games for the Mariners last season, Naylor slashed .299/.341/.490 with nine home runs, 33 RBI, and 19 stolen bases. He launched another three homers with a .340 batting average in Seattle’s 12 postseason games.

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— Seattle Mariners (@Mariners) November 17, 2025

This story will be updated.