Contreras is dealing with lingering swelling in his left hand but has yet to undergo imaging ahead of Thursday's game against the Marlins, Jeff Jones of the Belleville News-Democrat reports.
Contreras stayed in the game in Wednesday after being hit by a pitch in the sixth inning, drawing a walk in his final plate appearance in the eighth. His hand remains swollen, however, and there would seem to be a good chance he'll be held out of the lineup for Thursday's home opener. If Contreras unable to go, Ivan Herrera would do the catching for the Cardinals.