you can assume he got his ass kicked sparring.
same shit happened to taz titan. people thought he was gonna be a contender off his first fight then he got his ass kicked in a gym and stopped boxing.
Apparently Taz Titan was in a car accident.
http://www.maxboxing.com/Gerbasi/Gerbasi111706.asp
“And then we brought the heavyweight (Panayiotou) here, he had his debut, looked sensational, went back to Greece and had a car accident and broke his back.