Cody's wife, Brandi, shared the news on Twitter Thursday night ... revealing the 36-year old's injury was about as bad as it could get, but everything went well and he's looking forward to getting better.

"The doctor just repaired Cody's pectoral tendon which was torn completely off the bone," Brandi wrote. "Successful surgery. He is on the road to recovery now."

Rhodes reportedly went to see Dr. James Andrews, a renowned surgeon who specializes in dealing with wrestlers and athletes who injure themselves over the years.

Cody initially suffered a slight tear of his pec just days before his scheduled match with Seth Rollins at the "Hell in a Cell" Pay-Per-View.

However, he would suffer a full tear of the muscle -- which spread from his chest to his entire right arm -- while weight training, leaving his status for the event in question.

Rhodes gutted it out and competed -- defeating Rollins inside the relentless structure -- but he paid the price for it, as Seth continually targeted the injured area throughout the match ... as well as the following night on "Monday Night Raw."

WWE Superstars with Rhodes' same injury are typically sidelined anywhere from 3 to 5 months ... but Cody -- son of Hall of Famer Dusty Rhodes -- is hoping to return before that timeframe.