Joe Montana
Many older NFL fans maintain that Montana was the greatest quarterback ever. That’s tougher to do now that Tom Brady has almost double the amount of Lombardi trophies, but Montana remains one of the best quarterbacks to ever play in the NFL. He led the Niners to an unprecedented era in their history as they won four Super Bowls. But his career came to a sudden halt when he damaged his elbow. This meant that he missed an entire season and lost his place as a starter to another legend, Steve Young.

It left San Francisco in a tough position because Young was very talented with fewer miles on the clock. They traded Montana to the Chiefs and many people wrote him off. But he represented them well with a playoff win and even made the Pro Bowl one more time (via USA Today Sports).