Chicago White Sox pitcher Gavin Floyd was placed on the 15-day disabled list on Tuesday because of a strained right elbow flexor.
The move is retroactive to Monday.
Floyd, a right-hander, left Sunday's game against the Mariners because of pain in his right elbow. He is 9-9 with a 4.55 ERA this season.
He was sidelined from July 8 to July 23 with right elbow tendinitis.
Chicago recalled right-hander Dylan Axelrod from Triple-A Charlotte and sent outfielder Alejandro De Aza to Charlotte for an injury rehab assignment. De Aza has been out with bruised ribs.