Michael Soroka is on his way back to the Chicago Cubs after being sidelined by a shoulder strain. Soroka pitched 2 1/3 innings of one-run ball in a rehab appearance with Triple-A Iowa on Thursday. His fastball was clocked as high as 96.6 mph — a significant improvement on his velocity right before his injury. The 25-year-old closer was placed on the 15-day injured list on Monday with a right shoulder strain. Counsell said he doesn't think Tucker will be ready to be activated when he is eligible to return on Tuesday.