The Seattle Mariners acquire 1B Josh Naylor in a July 2025 trade, boosting their lineup for a playoff push. See the full trade details and what it means for the M's.
StatPro MLB Beat Reporter
The Seattle Mariners have officially entered the trade deadline chat. Ahead of a crucial series in Anaheim, the team activated newly acquired first baseman Josh Naylor, signaling a clear 'all-in' mentality for the second half. Naylor is expected to slide directly into the cleanup spot, bringing a potent left-handed bat to a lineup hungry for more production as they chase down the Astros.
In 93 games for Arizona, Naylor hit .292 with 11 HR, 59 RBI, and an .807 OPS.
The move is official. Josh Naylor, acquired from the Arizona Diamondbacks, is a Seattle Mariner. To make room on the roster, the versatile but light-hitting Miles Mastrobuoni (.252 AVG, .620 OPS) was optioned to Triple-A Tacoma. The cost for Naylor wasn't insignificant, as Seattle sent promising young pitchers Brandyn Garcia and Ashton Izzi to Arizona. However, the front office is betting that Naylor's proven offensive ability will be the catalyst this team needs to secure a postseason berth. He's not just a rental; he's the new everyday first baseman.
While the Naylor trade is the big splash so far, sources indicate General Manager Jerry Dipoto is far from finished. The Mariners are reportedly still working the phones hard, looking to bolster both the bullpen and add another piece to the lineup before the deadline. The acquisition of Naylor shows a willingness to deal from the farm system for immediate impact, and fans should expect the team to remain one of the most active players on the market over the next few days.
With the trade buzz swirling, there's still a game to be played. The Mariners (55-48) open a massive series against the Angels tonight, sitting 4.5 games behind the Astros in the AL West. Having a solid road record (27-24) will be key. Adding Naylor to protect hitters like Cal Raleigh (39 HR, 84 RBI) and J.P. Crawford (.376 OBP) could make this offense significantly more dangerous and lengthen the lineup against a division rival.
Even as the big league club trades away prospects for a pennant race, the farm system continues to produce exciting talent. Down in High-A Everett, No. 10 prospect Tai Peete reminded everyone of his potential by launching his 16th home run of the season on Saturday—a towering three-run shot. It's a great sign that while the present is the focus, the future in Seattle remains incredibly bright.
All eyes will be on Anaheim tonight to see how Josh Naylor fits into the lineup and if he can provide the immediate spark the team needs. With the trade deadline clock ticking louder each day, this weekend could define the Mariners' push for October. Will another move follow? Can they take this crucial series from the Angels? The next 72 hours are going to be a wild ride.
