Norman police records indicate the 26-year-old Dvoracek was arrested around 1 a.m. Saturday at Seven47, a restaurant near the University of Oklahoma.
Dvoracek appeared in 13 games in four seasons with the Bears after being drafted in the fourth round in 2006. He was placed on the waived/injured list in August because of a torn ACL in his right knee.
While at Oklahoma, he was temporarily dismissed from the Sooners after an altercation at a bar in Norman. He was reinstated after anger-management and alcohol-related counseling.
Norman police Capt. Darry Stacy says an arrest report won't be available until Tuesday.