Steele (thumb) felt good after throwing a bullpen session Friday, Jordan Bastian of MLB.com reports.
Steele exited his start last Sunday against the Dodgers with a sore left thumb. He felt the discomfort specifically while throwing his slider, but he was able to throw that pitch without issues Friday. The Cubs have yet to announce their starter for Sunday's series finale in Arizona, a job which could go to Steele if he's cleared to pitch.