Lt. Brandon Post said police were called to an apartment complex in Provo on July 29.
The alleged victim said a car was parked in his reserved spot and that a towing company had been called. Post said Davis and two friends came out of the building and confronted the owner of the parking stall and the tow truck driver.
Davis grabbed the man by the neck, according to the police report, and left minor bruising. The riot charge was added because several people were engaging in ''combative'' behavior.
Davis has pleaded not guilty.
BYU spokesman Brett Pyne said the university is aware of the citation and it has been addressed. Davis' status with the team has not changed.