Coffee was arrested in Florida on Friday morning for carrying a concealed firearm, according to TMZ. Police found the weapon cocked in his center console during a traffic stop.
The former NFL player had been pulled over for speeding in his 2008 Cadillac and was soon discovered to be driving a car without insurance or registration. When police searched the car before it was to be towed, they found the loaded weapon.
[Related: MLB player leaves team in middle of playoffs]
Police arrested Coffee and charged him with a third-degree felony, which is punishable in Florida by up to five years in jail. The arrest came in Coffee's hometown of Ft. Walton Beach.
In his rookie season with the 49ers, Coffee ran the ball 83 times for 226 yards and one touchdown. He was a third-round pick out of Alabama, where he made first-team All-SEC in his junior season.
Other popular stories on Yahoo!:
• College basketball power announces major violations
• High school coach loses her job over karaoke night
• Best pitch in baseball sets broken bat record