The Reds placed Steer on the 10-day injured list Monday with a right wrist sprain.
Steer suffered the injury on an awkward swing during Sunday's contest in St. Louis. The Reds have not yet revealed a timetable for Steer, but Buster Olney of ESPN reported earlier Monday that the 28-year-old is expected to miss "significant time." Noelvi Marte could see a playing time bump for the Reds while Steer is sidelined.