Las Vegas Raiders wide receiver Amari Cooper retired from the NFL just nine days after signing with the team. Here's what we know about his decision to hang up his cleats.

Cooper started last season with the Cleveland Browns but was dealt to the Buffalo Bills prior to the trade deadline. While Buffalo made the AFC Championship Game, Cooper was not a major player in the offense. He caught 28 passes for 338 yards and two touchdowns in 11 games played, including playoffs.

Las Vegas Raiders wide receiver Amari Cooper has informed the team that he no longer has the desire to play football and intends to retire, NFL Network Insider Ian Rapoport reported on Thursday.