Perez said after the game the injury wasn't serious.
"I'll be good," he said. "I think I can catch tomorrow."
Perez had singled in the top of the fourth inning and advanced to second on a sacrifice fly by Mike Moustakas that scored Eric Hosmer. Perez then caught the fourth inning before being replaced to start the bottom of the fifth.
Perez said he felt the tightness during the at-bat.
"It's the same thing I've had earlier this season, just on the other side," he said.