45 years ago, this happened:
December 2, 1975: Ohio State running back Archie Griffin becomes the first player to win the Heisman Trophy twice. Griffin again easily wins the Heisman vote by more than 1,000 votes, beating Chuck Muncie of California by 1,070 votes. In 1974, he beat Anthony Davis of USC 1,101 votes. Archie Griffin has led the Big Ten in rushing in three consecutive seasons, becoming one of the greatest running backs in NCAA history.
Archie unquestionably deserved his first Heisman, but the 1975 win is what we would charitably call "odd". The top four finishers were all RBs, and Griffin had easily the worst stats of all four. But alas, life isn't always fair.