Oregon co-offensive coordinator and tight ends coach David Reaves was arrested Saturday night and charged with driving under the influence, speeding and reckless driving.
The process to terminate Reaves' employment with cause has begun, according to the school.
"University of Oregon assistant football coach David Reaves was arrested last night and charged with Driving Under the Influence by members of the Eugene Police Department," Oregon athletic director Rob Mullens said in a Sunday news release.
"Reaves has been placed on administrative leave and the process to terminate his employment with cause has commenced. The University has high standards for the conduct of employees and is addressing this matter with the utmost of seriousness."
An adult passenger, who was in the vehicle with Reaves, was identified by the university in a statement Tuesday as Oregon wide receiver coach Jimmie Dougherty.
Records show Reaves is no longer in police custody. Bail was set at $1,460.
Oregon hired Reaves last Tuesday.
Oregon coach Willie Taggart, who was hired in early December to replace Mark Helfrich, brought Reaves along from South Florida, where he had coached four different positions in four seasons.
The news of Reaves' DUI charge comes less than a week after the Oregon athletics department suspended strength and conditioning coach Irele Oderinde for a month without pay because three football players were hospitalized following offseason workouts that Oderinde led.