The Rangers placed Junis on the 15-day injured list Thursday with a left adductor strain.
It's unclear when or how Junis was injured, but it will cost him at least the next two weeks of action. Junis has been one of the Rangers' best relievers this season, logging a 2.70 ERA and 30:7 K:BB over 40 frames. His spot on the roster and in the bullpen will be taken by Winston Santos.