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Winning one Heisman is tough enough, but winning two... Well, it's telling that only one person (Archie Griffin) has even done so. Here's a look at how some other repeat bids went awry, beginning with Bradford's, whose follow-up campaign was quickly derailed when he suffered a shoulder injury in the Sooners' season-opening loss to BYU.

Text: Cory McCartney/SI.com
Photo: Damian Strohmeyer/SI

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