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."

Philadelphia Phillies pitcher Aaron Nola breaks his silence amid his setback over a stress fracture in his rib, and he "doesn't really know" how he got the injury.

The veteran starter remains sidelined with a new injury that will keep him out of the Phillies' rotation for the foreseeable future.