The 21-year-old Seales pleaded not guilty Thursday in Payne County District Court.
An arrest report says the redshirt junior was stopped around 12:30 a.m. Sunday and failed field sobriety tests. The report says an officer found in the car a cup of liquor and two bottles of liquor with broken seals.
A message seeking comment from Seales' attorney wasn't returned late Thursday. A team spokesman has told local media that coach Mike Gundy is aware of the incident and is handling the matter internally.
Seales' arrest came hours after a woman who authorities say was driving under the influence of drugs or alcohol crashed into a crowd of spectators at the school's homecoming parade, killing four people and injuring dozens more.