17 NFL players to come out of retirement

Rob Gronkowski will return as a Tampa Bay Buc, becoming another player who returned after retiring.

Randall Cunningham

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After missing the 1996 season, ex-Eagle Randall Cunningham signed with Minnesota in 1997. A year later, he quarterbacked one of the best offenses in NFL history. The first-team All-Pro QB led the ’98 Vikings to a 15-1 record and a trip to the NFC title game.