Getty Dallas Cowboys wide receiver Amari Cooper in 2018. Even 5 years later, the amount of money the Dallas Cowboys decided to pay Pro Bowl wide receiver Amari Cooper still stuns — a 5-year, $100 million contract extension in March 2020 that made him the highest paid wide receiver in NFL history at the time. What’s not as surprising was Cooper’s decision to hang up his cleats and retire on September 4 — less than 2 weeks after he signed a 1-year, $4 million contract with the Las Vegas Raiders .