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 Chicago Cubs have placed right-hander Michael Soroka on the 15-day injured list with a right shoulder strain after lasting just two innings in his first start since being traded from Washington. Chicago recalled right-hander Nate Pearson from Triple-A Iowa in a corresponding move prior to Tuesday night's game against Cincinnati.