The 33-year-old pitcher was injured while batting in the top of the fifth inning over a 5-3 win over the Milwaukee Brewers on Saturday night. The injuries occurred after Wainwright broke from the batter's box on a fifth-inning popup.
Wainwright was expected to return to St. Louis with the team after Sunday's game for an MRI on Monday.
Catcher Cody Stanley has been recalled from Memphis-Triple A, the team said Sunday.
