Eugene “Mercury” Morris, who starred for the unbeaten 1972 Miami Dolphins as part of a star-studded backfield and helped the team win two Super Bowl titles, has died.

Eugene “Mercury” Morris, two-time Super Bowl champion with the Miami Dolphins and linchpin of the team’s perfect 1972 season has died, his son Troy-Jeffrey Morris announced on social media on behalf of the family Sunday.

In 1982, Morris was convicted of cocaine trafficking and was sentenced to 20 years imprisonment, with a mandatory 15-year term. In 1986, his conviction was overturned by the Florida Supreme Court because evidence he had offered to prove his entrapment defense had been excluded under a mistaken characterization as hearsay.