The Orioles placed Mateo on the 10-day injured list Thursday with a left elbow subluxation.
Mateo suffered the partial dislocation of his elbow during Tuesday's game against the Marlins in a collision with teammate Gunnar Henderson. It's unclear how much time the infielder might miss, but an absence longer than the minimum 10 days is certainly possible. The Orioles recalled Connor Norby from Triple-A Norfolk in a corresponding move to add depth in the infield.