Rob Gronkowski will return as a Tampa Bay Buc, becoming another player who returned after retiring.
John Riggins
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After sitting out the 1980 season, John Riggins came back with a vengeance. The burly running back played five more years, leading Washington to a victory in Super Bowl XVII. In 1983, at age 34, he rushed for 1,347 yards and a then-NFL record 24 touchdowns.
