Harvey had surgery July 18 to remove a rib that was constricting nerves and blood vessels that travel through his shoulder -- where the rib connects to the upper spine.
"I'm doing well, coming along," Harvey said at an event in New York during September, according to the New York Daily News. "Rehab's a little slow, but it's coming along. I'm doing whatever the doctors say and it's a little bit slower than I thought, but I'm doing everything I can to get back on the field."
The surgery is designed to restore feeling in Harvey's pitching arm and fingers.