The autopsy on Pernell Whitaker has been completed -- with officials saying the boxer died from "multiple blunt force injuries" in a car accident that has been labelled an "accident."
TMZ Sports broke the story ... the 55-year-old boxing legend was hit by a car while walking in Virginia Beach on Sunday night around 10 pm. Emergency responders raced to the scene and treated Whitaker but couldn't save him.
The driver of the car was cooperative with police -- and we're told officials do NOT believe alcohol, drugs or speed was a factor in the incident.