Cody Rhodes is built different ... the son of WWE Hall of Famer, Dusty, defeated Seth Rollins in a Hell in a cell match after tearing his pectoral muscle earlier in the day.
WWE announced the news on its "Hell in a Cell" kickoff show ... saying Cody had his right pectoral tendon "completely torn off the bone while weight training."
Still, the 36-year-old wrestling star proceeded to fight Seth ... inside, arguably, the most dangerous match in WWE history.
As the match was about to start, Rhodes took off his robe .