She said Mixon was "harassing" her and some of her friends at a local cafe before the incident.
According to the paper, Norman police have confirmed an incident at Pickleman’s Gourmet Cafe, but said no arrests were made and an investigation is underway.
"We are aware of this matter and it is under review," an OU Athletics spokesman said Friday night. "We take these reports very seriously."
The 6-foot-2, 220-pound Mixon, from Oakley, California, is a five-star freshman who many projected to play a key role in the Sooners offense this fall for a team searching for a big-time running back.
Earlier this offseason OU accepted former Missouri wideout Dorial Green-Beckham, another former five-star recruit. Green-Beckham had been arrested twice for marijuana-related incidents and was also the subject of a domestic abuse investigation in April that prompted the 6-6 receiver to get booted from the Tigers program.