Joe Mixon runs 40-yard dash in unofficial 4.43 seconds at pro day

Mixon runs unofficial 4.43 40-yard dash (0:16)

Participating in a pro day, former Oklahoma running back Joe Mixon demonstrates his speed in the 40. (0:16)

NORMAN, Okla. -- Joe Mixon produced an unofficial 40-yard dash time of 4.43 seconds during Oklahoma's pro day Wednesday, which would have been the fourth-fastest time among running backs at last week's NFL scouting combine.

Only running backs North Carolina's T.J. Logan (4.37), Utah's Joe Williams (4.41) and North Carolina A&T's Tarik Cohen (4.42) clocked better times at the combine.

Mixon was not invited to the combine because of off-the-field conduct. The NFL instituted a rule this year that bars players from participating in the combine if they have misdemeanor or felony convictions involving violence against women.

Mixon punched a female Oklahoma student in the face in 2014, his freshman year at the school. He initially received a misdemeanor assault charge but accepted a plea deal with one year of probation, counseling and 100 hours of community service. The Sooners also suspended him for the entire 2014 season.

Tuesday night, sources confirmed to ESPN.com that Mixon met individually with at least a dozen NFL teams -- including the Browns, Bengals, Lions and Saints -- which the NFL Network first reported. Mixon was expected to meet with several more teams later Wednesday. All 32 teams were represented at Mixon's workout, and Vikings coach Mike Zimmer was there.

Mixon said his goal for the pro day was for NFL personnel to "get to know me" beyond the 2014 incident.

"There ain't nothing to hide," Mixon said. "Everybody has seen everything. Everybody knows what's going on. At the end of the day, sit in front of them, look them in the eye, have them get a feel for me."

Mixon said he's trying to undo some of the damage he did to his reputation, but he's not sugar-coating anything. "[I'm] pretty much owning to what I did that day. I know it wasn't right," Mixon said. "It's never right."

The combine was something that Mixon had been looking forward to, but he said he's glad he got the opportunity to participate in the pro day.

"It meant a lot for me to come out here and showcase what I can do with my teammates," he said. "I left it all on the line. It's all over with now. I showed what I can do."

Mixon rushed for 1,274 yards, gained another 538 receiving and scored 16 touchdowns, including one on a kickoff return, in 2016.

Former Oklahoma wide receiver and 2016 Heisman finalist Dede Westbrook also worked out for scouts Wednesday. Westbrook, who chose not to run at the combine, delivered a 40 time of 4.34 seconds. That would have been the third-fastest time at the combine among receivers.