With the win, the Diamondbacks improved to 35-34 and moved past .500 for the first time since May 23, when they were 26-25.

In the 11th inning of their showdown with the Seattle Mariners on Monday night, the Arizona Diamondbacks snatched a clutch victory thanks to Josh Naylor's heroics at the plate.

Padres starter Stephen Kolek allowed four earned runs and gave up two home runs in his 4 1/3 innings of work Friday night.

With one big swing, Diamondbacks first baseman Josh Naylor saved the day for Arizona, which defeated the Mariners on Monday night.

Josh Naylor hit a game-ending grand slam in the 11th inning and the Arizona Diamondbacks beat the Seattle Mariners 8-4 after losing closer Justin Martinez with two outs in the ninth and then blowing a four-run lead.

Arizona Diamondbacks' Josh Naylor discusses the moment he hit his walk-off grand slam to beat the Seattle Mariners on June 9, 2025.

Diamondbacks first baseman Josh Naylor delivered a walk-off grand slam in the 11th inning to avoid another potentially disastrous loss.

A Boston Red Sox trade idea lands Arizona Diamondbacks slugging first baseman Josh Naylor after Rafael Devers refused to take over first base duties.