Gallen was removed from Saturday's game against the Phillies with a suspected groin injury, Jesse Friedman of GoPHNX.com reports.
The Diamondbacks' training staff came out midway through the fifth inning, and, after a short discussion, opted to remove Gallen from the contest. Gallen gave up his lone run of the start immediately before exiting, with Bryce Harper driving in Kyle Schwarber on a groundout. Gallen's final stat line included one run on five hits and two walks with three strikeouts across 4.1 innings. Gallen should undergo further testing Saturday night, and more information on his status should be provided in the coming days.