"He did seem to come in with a lot better frame of mind and optimistic that he won't have to be on the [disabled list] and could hopefully make his next start," manager Dale Sveum said Sunday.
The Cubs have an off-day Thursday and could skip Garza or alter the rotation to give him more time.
"Talking to him, it doesn't seem real concerning at this point," Sveum said.
Garza didn't sound too concerned.
"I think it's a cramp that's stiff today," Garza said. "I had better movement today than yesterday, so that's a positive."