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.

Part of a talented backfield triumvirate that also included Larry Csonka and Jim Kiick, he helped lead Miami to two Super Bowls and an undefeated season.

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.