CHICAGO -- A.J. Pierzynski and Phil Humber each started a rehab assignment at Triple-A Charlotte on Tuesday.
Humber was pitching in a game for the first time since he took a line drive off his forehead on Aug. 18. He is scheduled to return from the DL this weekend. The White Sox will need an extra starter to help cover a doubleheader on Monday at Minnesota.
He went five innings, giving up four runs on seven hits with a walk and five strikeouts in the 88-pitch outing.
"My command, I was throwing strikes but not throwing quality strikes," Humber said. "That’s to be expected. Main thing to me was the psychological part of it. All and all, it definitely was a positive outing to build off and get ready to go."
Pierzynski, who is already eligible to return from the DL, has been out since Aug. 12 after getting hit on the left arm by a pitch. He went 0-for-3 on Tuesday.
Pierzynski is expected to return when rosters are eligible to be expanded on Thursday. The White Sox are off that day but open a three-game series at Detroit on Friday.