MLB trade deadline action officially kicked off when the Seattle Mariners acquired first baseman Josh Naylor from the Arizona Diamondbacks on Thursday.

Jerry Dipoto has a longstanding reputation for jump-starting the Trade Deadline market, and the Mariners’ president of baseball operations indeed sparked this year’s traction, with the first major domino falling to Seattle on Thursday night.

The Boston Red Sox will be targeting a first baseman at the 2025 MLB trade deadline, this prediction lands a former All-Star to fill the void.

Though the move is a position upgrade for Seattle, it isn’t ideal for Naylor’s fantasy value — he was hitting .324 with five homers, 36 RBIs and a .855 OPS at Chase Field. Since 2021, Naylor hit a homer roughly once every 24 at-bats — including a career-high 31 last year with Cleveland when he hit one every 18 at-bats.

Mike Salk and MLB Network's Jon Morosi describe the various ways that recently acquired first baseman Josh Naylor can help the Seattle Mariners.

Pressure is a privilege in the eyes of new Seattle Mariners slugger Josh Naylor. The 28-year-old first baseman is looking forward to the opportunity to bat cleanup in his first game with Seattle against the Los Angeles Angels on Friday night.

In a wide-open American League, the Mariners will have as good a chance as anyone to make a deep postseason run, and Naylor could be a big part of that. He’s played in three postseasons and is known for hitting clutch home runs.

Josh Naylor floats an RBI single into right-center field, scoring Ketel Marte to tie the game at 3 in the bottom of the 8th inning