The third baseman finished 3-for-4 with four RBIs on the night.
Gallo is a little more than a month removed from his debut with the big league club. In Arlington, he hit homers in each of his first two games, but eventually cooled off to finish .218/.306/.448 with five roundtrippers and 13 RBIs in 25 contests. The 21-year-old made his Round Rock debut on July 1 and Thursday night's performance marked his first three-homer game at Triple-A.
Gallo's outburst is the continuation of a recent hot streak. He has six homers and eight RBIs in his past six games.
Alex M. Smith is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.