Overview
- Horton, who left Friday's start in Cleveland with right forearm discomfort after 17 pitches, will go on the injured list, the team said.
- Manager Craig Counsell said Horton is returning to Chicago for imaging, and Horton said he exited to avoid making anything worse.
- A noticeable velocity dip preceded the exit, with his last fastball at 93.8 mph after sitting 95–96 in the first inning.
- Veteran Colin Rea covered 3.1 innings in relief and profiles as the short-term fill-in for the next turn through the rotation.
- The setback arrives while ace Justin Steele rehabs from elbow surgery, and forearm pain in pitchers can sometimes hint at ulnar collateral ligament trouble, though tests will determine the diagnosis.