What do African-American football players Ernie Davis, Archie Griffin, and Tony Dorsett have in common?

Ernie Davis was the first African American to win the prize in 1961, and Archie Griffin is the only player to have won it twice, in 1974 and 1975. Only Dorsett played for Pittsburgh. Davis played for Syracuse and Griffin played for Ohio State. Only Dorsett did lead his team to a Super Bowl title as NFC Rookie of the Year in 1977-78.