The Chicago Cubs are already down their trade deadline rotation upgrade. Right-hander Michael Soroka, who came over from the Washington Nationals in a three-player trade last week, exited Monday's game (CIN 3,

Starting pitcher Michael Soroka is heading to the injured list after exiting his first start as a member of the Chicago Cubs early on Monday.

The Chicago Cubs say they knew the risk when they traded for pitcher Mike Soroka -- who saw his velocity drop over his final few starts for the Washington Nationals before the deal. On Monday, Soroka left his first start for the Cubs because of  shoulder discomfort,