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.

Who won the Josh Naylor trade between the Arizona Diamondbacks and Seattle Mariners? Check out early grades to Josh Naylor trade on July 24, 2025.

The Mariners and Yankees sit in wild-card spots and they are chasing the same player. The two teams have shown interest in Rockies third baseman Ryan McMahon, reports the Denver P

The Seattle Mariners have already added a star first baseman to their roster. Could they also swing a franchise-altering move for MacKenzie Gore?

The Arizona Diamondbacks got the trade deadline party started on Thursday night when they dealt 2024 All-Star Josh Naylor to the Seattle Mariners for two pitching prospects. Arizona has had a disappointing season with a 50-53 record and now appears to be one of the most active sellers on the MLB market,

The first of several major trades will happen before the 2025 MLB trade deadline and the Inside the Lines team is here to quantify the impact of each one as they happen