It happened about 2 a.m. Friday on Route 5 at Lakewood Place.
Charles County Sheriff's Department spokeswoman Diane Richardson says a deputy saw a Mercedes cross the center line several times. Richardson says after pulling over the 24-year-old Westbrook, the deputy smelled alcohol and administered field sobriety tests. Richardson says Westbrook failed and was arrested.
Westbrook is charged with DUI, DWI, negligent driving and failure to drive right of center. He was released on personal recognizance.
A message was left seeking comment from Westbrook's agent. The Redskins issued a statement Friday saying the team would "monitor the situation."