Coming off a quality showing at the NFL Combine to go along with the way he was dismissed from OU in November, there was some question about whether Williams would come back or would even want to come back.
Williams said he talked with OU coach Bob Stoops and there are no hard feelings. Stoops wanted to give him a chance to show what he could do in front of more scouts.
Williams didn't go through all the testing and drills, but he never thought about not showing back up at OU.
"It meant everything to me (to know he could come back)," Williams said. "It showed me we're still a family."
Williams was among OU's leading rushers for the 2013 season when he was dismissed for a violation of team rules. Williams wouldn't say more than that Wednesday, explaining his dismissal as "there are rules, and I broke them."
Colvin, Millard working their way back
Colvin tore his ACL in January, while Millard is recovering from a torn ACL that happened in October.
As both continue their rehab, they can't do much at this point to help improve their draft status.
"It will be a while before I can do what I used to do," Millard said. "I won't be cleared until July, and I'm just working with what I can."
Both Colvin and Millard were very optimistic about their chances of making an NFL roster and about making full recoveries.
Allen comes back
There was only one quarterback throwing at pro day, and he wasn't on an OU roster last season. Former Sooners quarterback Drew Allen returned to throw to some of the receivers he used to practice with and former teammates and friends.
Allen transferred from OU following the 2012 season and spent last season at Syracuse. Now mentored by former NFL Pro Bowl quarterback Jeff Garcia, Allen showed flashes during pro day.
He measured at 6-foot-5 ¼ inches and 231 pounds and was timed at 4.68 seconds in the 40-yard dash.
Good homecoming for Blankenship
Arguably the best pro day wasn't from someone on OU's roster last season. Running back Beau Blankenship, who played at Ohio, returned to Norman on Wednesday.
Blankenship was a high school star at Norman (Okla.) North and competed at OU on Wednesday with plans to be back for Ohio's pro day Thursday.
He said he probably won't run the 40-yard dash Thursday, not after being timed at 4.47 at OU. He also benched 225 pounds 27 times.