Matt Garza left the practice field with a mild lat strain in his left side Sunday, but the injury isn't expected to be serious.

"It's not that bad," Garza said. "It's just kind of day to day."

He was 20 pitches into a 40-pitch batting practice session when he felt something he thought was a cramp.

"I threw the first fastball from the stretch and thought water cramp," Garza said. "Then the next one, and figured I'm not going to push it."