Marra, who had been rehabilitating from a torn ACL last season to his left knee, went down with what Rick Pitino called a likely career-ending knee injury. He tore the same ACL less than 10 minutes into practice.
"We've been working Mike Marra out individually for the last two months," Pitino told Terry Meiners on WHAS-840. "He'd passed all the tests. Literally, the first 10 minutes of practice he blew out the same knee with another ACL."
Marra suffered the initial injury last season during a game. He said in a recent interview that everything was "going great" with his rehab.
"These ACLs are the strangest thing," Pitino told Meiners. "In football, it happens with a clip. In basketball, it happens with no contact but just pivoting. . . . It's always with a pivot the other way."
Marra, who wants to get into coaching and will transition into a player-coach type situation with the Cardinals, had played in two games last season. He played in 27 games as a freshman and scored in double figures 11 times as a sophomore.