Luis Castillo allowed a run in seven innings, Josh Naylor hit his first home run for the Mariners and Seattle beat the Athletics 3-1.

Naylor is slashing .292/.360/.447 this season, with 11 home runs, 59 RBIs and 11 stolen bases. The Diamondbacks had acquired Naylor in an offseason trade with the Guardians, with the slugger coming off a 31-homer, 108-RBI campaign in Cleveland. Naylor, 28, is a free agent at the end of the season, making him a rental for Seattle.

A former Seattle Mariners reliever didn't have to wait long to get an opportunity with his new team. The Mariners traded pitching prospects Brandyn Garcia and A

Arizona Diamondbacks' Josh Naylor, left, starts his swing on a catcher interference with St. Louis Cardinals catcher Pedro Pagés during the first inning of a baseball game Saturday, July 19, 2025, in Phoenix. Credit: AP/Ross D. Franklin