NFL's Aldon Smith Pleads Not Guilty In DUI Hit & Run

Oakland Raiders superstar Aldon Smith is fighting the charges in his DUI case -- pleading not guilty to allegations he smashed his SUV door into another car and then drunkenly drove from the scene.

Aldon was arrested on August 6th -- after cops say he tried to get out of his car in a lot about a mile from Levi's Stadium when he swung the door open into the car next to him, causing roughly $500 in damage.

Cops say Smith got back in his car and left ... only to return to the scene on foot, where cops were waiting. Aldon then bombed a sobriety test and was arrested for DUI, hit and run and vandalism.

If convicted, Smith -- who has been arrested for DUI twice -- faces up to 2-and-a-half years behind bars.