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.

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 Cubs acquired right-hander Michael Soroka ahead of last week’s Trade Deadline with the idea that he could offer depth for both the rotation and bullpen. That plan is now in flux following a setback in the pitcher’s debut for the ballpark on Monday night.