Jennifer Mitchell / Splash News

After attempting to overcome numerous obstacles as a young boy, The Rock decided to turn things around, and at 18, he won a full football scholarship to the University of Miami and was ecstatic when he was the only freshman chosen to play, something very rare in college football.

However, he began to sustain multiple injuries and ended up dropping out of school without even taking his midterms. Johnson saw himself going into a downward spiral again, until his coach called and set him straight. "He says, 'Get your ass in a car and come back right now.' He was so embarrassed and pissed. It's one thing when you go through an injury and depression. It's another when you walk away and say, 'F— it.' "

The Rock went back to school and continued to dream of playing for the NFL. Unfortunately, when the draft came, he wasn't picked. He went on to get signed by the Canadian Football League's Calgary Stampeders, which was far less luxurious than what he pictured in his mind, but it was something.