Dodgers left-hander Hyun-Jin Ryu underwent surgery to repair a torn labrum in his left shoulder Thursday morning, and the team is optimistic he will be ready for next spring training, manager Don Mattingly said.

"From the little I understand, it went as well as could be expected," Mattingly said. "We're not going to have him this year, but it sounded like he'll be ready to pitch next year."