Oklahoma State receiver Michael Harrison has left the program, Cowboys coach Mike Gundy told local reporters on Tuesday.
Harrison was suspended by the NCAA for the 2012 season, and had the option to stay with the team and begin playing again in 2013, but he elected to leave the team.
"The NCAA suspended him," Gundy told The Oklahoman. "I never suspended him, and then he chose to not play football. He made that choice himself. My recommendation to him was to finish school, because that's what you have to do. You can't go anywhere at this particular time ... and then if he chooses to (leave), that's his call.
"I don't know what he wants to do. I just know that he's decided he does not want to play football anymore."
Harrison is still enrolled at Oklahoma State and using the school's academic services.
The junior caught 20 passes for 255 yards and three touchdowns last season and projected as a likely starter at outside receiver in 2012. Harrison had not informed Gundy of his future plans, though Gundy said he would grant Harrison a release to transfer if he asked for one.
Oklahoma State begins spring practice on Monday.
David Ubben covers the Big 12 for ESPN.com.