I guess it’s from throwing, and I get work in that area a lot," Nola said of the injury. "I’m not really sure,” he said. “I’ve never had a stress fracture in my rib before."

Phillies right-hander Aaron Nola suffered another setback in his return to pitch when an MRI showed he has an injury in his right ribcage and will be shut down for two weeks.

Philadelphia Phillies manager Rob Thomson revealed that he doesn't know the origin of Aaron Nola's fractured ribs, which caused a setback in Nola's recovery.