The Seattle Mariners have acquired lefty-batting first baseman Josh Naylor from the Diamondbacks. Arizona gets left-hander Brandyn Garcia and right-hander Ashton Izzi back in the deal. The Diamondbacks announced the trade on Thursday evening.

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.

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.