Greg Oden is attempting to return to the NBA after not playing since 2009.
Oden has received interest from the Cleveland Cavaliers and Miami Heat, amongst other teams.
Deshaun Thomas, who attended Ohio State like Oden, said on Thursday that the two have been working out.
"Man, he looks unbelievable," he said at the draft combine. "He's running. He's lifting weights. You might be seeing a comeback. He looks like he's ready to go. He's running, getting in shape. I'll tell you one thing. For a big 7-footer that's all he does, running and getting in shape. He's looking right."