BALTIMORE -- The White Sox placed right-hander Gavin Floyd on the 15-day disabled list with a right elbow flexor strain prior to Tuesday night's game. The move is retroactive to Monday.

The club recalled right-hander Dylan Axelrod from Triple-A Charlotte to make the start Wednesday against the Orioles.

The White Sox also assigned outfielder Alejandro De Aza to Charlotte for an injury rehab assignment. He has been on the DL since Aug. 21, retroactive to Aug. 18, with bruised left ribs. De Aza is batting .281 with six home runs, 44 RBIs, 73 runs scored and 21 stolen bases in 111 games this year.

Floyd, who left his last outing against the Mariners on Sunday after experiencing discomfort in his right elbow, is 9-9 with a 4.55 ERA over 15 starts this season. He was previously on the DL in July with right elbow tendinitis.

Axelrod, 27, has appeared in 10 games (six starts) for the White Sox this season, going 1-2 with a 5.63 ERA over 38 1/3 innings. Axelrod is 7-5 with a 2.88 ERA in 16 starts with Charlotte.

"I'm looking forward to another opportunity," Axelrod said. "I know we're in the thick of it here, in the race. I [want to] try to contribute."

"[Axelrod] has proven he can pitch, so it's a good choice," White Sox manager Robin Ventura said.

Axelrod's addition helped the White Sox out in a different way as Jake Peavy, scheduled to start Friday in Detroit, has been battling problems with his right eye. Ventura said it's red and the pitcher can't see very well out of it and wouldn't have been able to start Wednesday anyway.