The Arizona Diamondbacks won a thrilling, yet costly game against the Mariners in walk-off fashion by a score of 8-4. Merrill Kelly pitched well through six innings, but an injury to closer Justin Martinez led to a bullpen blowup. Josh Naylor played hero, crushing a walk-off grand slam in the 11th inning.

Josh Naylor makes a nice snag on a 110.9 mph line drive by Cal Raleigh in the 5th inning

That brought the tying run to the plate in Dom Canzone, who was called up before the game to replace the void left (and created) by Leody Taveras. Canzone worked a full count. He got a belt-high fastball. He sent it 450 feet away at 115.6 mph. It was a new ballgame. But it was not. The Mariners would go on to lose by the same margin, 8-4.

The Arizona Diamondbacks broke out of a slump Monday as Josh Naylor belted a walk-off grand slam to cap an 8-4 win in 11 innings against the Seattle Mariners.

Josh Naylor makes a terrific diving catch on a 98-mph line drive from Cal Raleigh to kickstart an unassisted double play that close out the 8th inning

Josh Naylor hit a walk-off grand slam with one out in the 11th inning and the Arizona Diamondbacks recovered from a blown lead in the ninth for an 8-4 victory