PHOENIX — San Diego Padres reliever Mason Miller was bringing the heat on Tuesday night.

Arizona Diamondbacks outfielder Lourdes Gurriel Jr. returned the favor.

Gurriel crushed a 103.9 mph fastball from Miller into the left-field seats for a two-run homer in the eighth inning, tying the game at 5-all. It was the hardest hit pitch for a homer since MLB started pitch tracking in 2008.

It was part of a two-homer night for Gurriel. The veteran also hit a two-run shot in the first inning.

The hard-throwing Miller was acquired from the Athletics at last week’s trade deadline. He routinely throws over 100 mph and hit 104.2 mph with his hardest pitch on Tuesday night.

Luis Arráez hit a go-ahead single in the 11th inning and the Padres tacked on four more runs to beat the Diamondbacks 10-5.

The Associated Press contributed to this report.