Shane Bieber will be sidelined until at least mid-September because of elbow inflammation, a significant blow to the Cleveland Guardians.

Bieber hasn't pitched since July 9. The Guardians transferred him to the 60-day injured list.

Terry Francona said Bieber did not experience a setback while rehabilitating in Cleveland but won't be back until the season's final month.

"Shane is actually self-reporting that he's doing great, which we love hearing," Francona said. "But when you do the math, it's going to be another six days until he throws, then three weeks after that until he gets back on the mound. That's six weeks right there."