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, CHC 2) with shoulder discomfort and is headed to the injured list. Soroka was two innings into his first start with the Cubs.

Chicago Cubs starting pitcher Mike Soroka of Calgary is headed to the injured list with right shoulder discomfort.

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.