Diamondbacks' Naylor Hits Walk-Off Grand Slam in Dramatic Victory

Arizona Diamondbacks' Josh Naylor hits walk-off grand slam in dramatic victory against Seattle Mariners. The Arizona Diamondbacks secured a thrilling win against the Seattle Mariners on June 10th, 2025, thanks to a remarkable walk-off grand slam by Josh Naylor. The game was tied 4-4 in the bottom of the ninth inning when Naylor stepped up to bat with bases loaded. The tension was palpable as Naylor connected with a 91 mph pitch, sending the ball soaring into the stands for a grand slam, securing an 8-4 victory for the Diamondbacks. "It was an incredible feeling," Naylor said after the game. "To hit a walk-off grand slam like that, especially in a close game, is something I'll never forget." The win marks the third walk-off grand slam in Diamondbacks history, the first since Ryan Roberts accomplished the feat in 2011. The Diamondbacks' celebration was electric, showcasing the team's camaraderie and excitement.