Galvis hit a bases-loaded single to right field in the ninth inning to give Philadelphia a 2-1 victory over the Atlanta Braves on Sunday, its second straight walk-off win.
The shortstop also made three excellent plays in the field, including a run-saving gem in the first inning.
"I try to catch the ball and do the job for my pitchers and for the team," Galvis said.
Andrew Knapp led off the ninth with a double to left off Rex Brothers (1-2), who was replaced by Akeel Morris.
Morris walked pinch-hitter Ty Kelly.