"It was crazy to see him," said former Sooner Travis Wilson, a Cleveland Browns wide receiver who watched his ex-teammates work out for NFL scouts. "When I first walked in here, I looked and had to look back."

Grady left OU shortly before the 2005 season, bowing out of a quarterback race with Rhett Bomar and Paul Thompson. He transferred to Utah, where he redshirted a year, then, after a coaching change, mostly rode the bench. But he played enough for NFL scouts to want a closer look.

On Monday he worked out for 13 scouts at Utah; on Tuesday more than 20 teams (roughly 60 scouts) saw him. OU coach Bob Stoops welcomed Grady back.

"We didn't have a quarterback to throw (for pass receiving drills), so that worked out good," Stoops said. "Tommy asked to come back and do some things, so it worked out good for him and for us."

At OU, Grady was 6-foot-5 and 225 pounds. Now he's 6-6 and 245, with bulging muscles. Almost all his passes were virtually perfect.

"Tommy's got an arm on him," said running back Allen Patrick. "He came out here and threw some pretty good balls today."

Grady said he immediately doubted his decision to leave OU -- particularly in light of OU's quarterback situations the last three preseasons.

"I regret leaving this place," he said. "Like coach (Chuck) Long said, it's not always greener on the other side. I was looking forward to leaving, but when I left, I was wishing I had stayed here.

"I think I could have stuck it out. Coach Long was kind of telling me that, because they had Paul and Rhett at the time, he told me I wasn't going to be able to compete in the fall. So I thought Rhett was going to come in and do a good job. He did good, but he had his thing going on. I regret leaving, but I try not to look back too much."