The Chicago White Sox will be without closer Liam Hendriks for at least two weeks after the closer was placed on the 15-day injured list Tuesday due to a right forearm strain.
The move is retroactive to Saturday.
A two-time All-Star, Hendriks was not available for Monday's 9-5 win against the Detroit Tigers due to what the team said was a sore arm, but he did play catch before the game.
He is 1-2 with an AL-best 16 saves, a 2.81 ERA and 37 strikeouts in 25 appearances this season.