Freshman and the Heisman Trophy

Talk of Adrian Peterson competing for the Heisman bring up talk of past freshman - and only 3 have finished in the voting - all at 3rd, one from GT:

Three freshmen have finished third for the Heisman: Georgia Tech running back Clint Castleberry in 1942, Georgia running back Herschel Walker in 1980 and Virginia Tech quarterback Michael Vick in 1999.