Christian McCaffrey
The Carolina Panthers recognized that they had a diamond on their hands in McCaffrey. They made him the highest-paid running back in NFL history in 2020. This was after a Pro Bowl season where he entered Offensive Player of the Year contention. However, it all went wrong in a flash for McCaffrey (via The Athletic).

Injuries ravaged him over the next couple of seasons and he only played 10 games. This frustrated many fans, who wrote him off and thought that he’d never achieve his best form again. However, the Panthers traded him to San Francisco and he made an instant impact out West. He even completed the rare trifecta of passing, receiving, and rushing a touchdown in one game as he stormed back.