What player in the NFL, past or present, would you have wanted to see succeed so badly but due to injuries, off the field issues, or whatever happened just derailed their career? For me it was unfortunate to see players like Josh Gordon or Justin Blackmon have their careers end or never getting back on track because of off-field issues.
Percy Harvin. He was my favorite college player and was incredible as a rookie winning rookie of the year. Unfortunately injuries ruined what should have been a great career. It was a lot of fun seeing him tear it up in the Super Bowl though.