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

In the 11th inning of their showdown with the Seattle Mariners on Monday night, the Arizona Diamondbacks snatched a clutch ...

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

Josh Naylor hit a game-ending grand slam in the 11th inning and the Arizona Diamondbacks beat the Seattle Mariners 8-4 after ...

Josh Naylor discusses the moment he hit his walk-off grand slam to beat the Mariners ...

In the bottom of the 11th inning in a tie game, Naylor clobbered a walk-off grand slam deep into the right field night. He ...

Josh Naylor's dramatic walk-off grand slam in the 11th inning propelled the Arizona Diamondbacks to an 8-4 victory over the ...

Josh Naylor hammers a grand slam to right-center field to walk off the Mariners in the 11th inning and win the game 8-4 ...

Josh Naylor describes hitting a walk-off grand slam in the 11th inning after the D-backs surrendered the lead late in their ...

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

Naylor went 3-for-5 with a grand slam, an RBI double, a walk and two total runs scored in Monday's 8-4 extra-innings win over the Mariners.

Josh Naylor delivered a walk-off grand slam for his Arizona Diamondbacks on Monday night, but you wouldn't know it based on his reaction in a postgame ...