KJ Hamler just can’t shake the bad injury luck. The fourth-year wide receiver recently tore his pectoral muscle while training on his own away from the Broncos facility, a source confirmed to The Post on Thursday morning. He is looking at a rehabilitation timeline of four to six months, the shorter end of which would have him healthy for the start of training camp in late July. The NFL Network first reported Hamler’s injury. The former Penn State standout and 2020 second-round pick of the Broncos was just getting back toward full health after a hamstring injury and subsequent aggravation cost him the final nine games of the 2022 season.