"It didn't bother me catching at all and I didn't think it would," Gattis said. "But I strained it running, so I think running is the biggest thing. I was going to shut it down if I felt anything. I didn't feel anything. But I also wasn't pushing it."
Gattis has described the ailment as something that would not sideline him during the regular season. He hopes to be in the lineup for Monday night's game against the Astros.
Mark Bowman is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.