The Sooners’ six Heisman winners is one less than the number won by Notre Dame, Ohio State and USC, although USC is officially credited with six (the Heisman won by Reggie Bush in 2005 was vacated by the Heisman Trust because of NCAA violations against Bush and USC) and Archie Griffin won the Heisman twice, the only player to do so two years in a row, in 1974 and 1975.
The six Heisman Trophies won by Oklahoma Sooners in the 83 years the award has been presented are three more than any other college program not named Notre Dame, Ohio State or USC.