Cardinals rookie pitcher Michael Wacha is still without a definite role Sunday after making a successful spot start Saturday against the Cubs. Wacha, however, is likely to shift to the bullpen, per MLB.com.

"Anything to stay up here, that's what I'm looking for," Wacha said. "Everything felt good when I was in the 'pen last year, but I guess we'll see."

Cardinals manager Mike Matheny said Friday he doesn't plan to move to a six-man rotation, and added Sunday the plan right now is to make sure Wacha gets rest following Saturday's start.

"He's going to recover from his start yesterday, and we'll just kind of keep moving forward," Matheny said.