#6. Bob Mathias
One of the greatest athletes ever, he won the Gold in the decathlon in the 1948 and 1952 Olympics. Naturally, producers wanted the handsome, 6'3" medalist for films. Unfortunately, he chose the Italian sword-and-sandal epic The Minotaur (1960). Unfortunately, no one believed he couldn't hit the fake-looking monster with a javelin! (Photo: Getty Images)