Contreras exited Thursday's game against the Cubs due to a scalp laceration and is considered day-to-day, Derrick Goold of the St. Louis Post-Dispatch reports.
Contreras was hit in the back of the head by Ian Happ's backswing in the first inning and immediately exited the game. A stint on the injured list certainly seems possible, but for now, the team is hoping he can return more quickly.