The Chicago Cubs face a significant setback as rookie pitcher Cade Horton has been placed on the 15-day injured list with a rib fracture, ruling him out for the wild-card series. Horton, a contender for Rookie of the Year, suffered the injury, leaving the Cubs to adjust their playoff rotation. His status was previously uncertain, but the MRI confirmed a disappointing diagnosis, and the team is now navigating the implications of losing one of their top pitchers just ahead of the postseason.