Stewart (shoulder) will start for Triple-A Oklahoma City on Thursday, Bill Shaikin of the Los Angeles Times reports.
Stewart is set to make his first rehab appearance for Oklahoma City after getting roughed up at High-A on Saturday; he allowed three runs (two earned) on three hits and a walk while recording just one out for Rancho Cucamonga. Given he's been sidelined for an extended period of time, Stewart will likely need multiple rehab appearances before he is ready to return.