Justin Blackmon
If not for off-field problems, Blackmon could have been something great. He had 64 catches for 865 yards as a rookie with the Jaguars in 2012, performing far better than the average rookie wide receiver. Based on that and his incredible accomplishments at Oklahoma State, it was a safe assumption that Blackmon would be the next elite NFL receiver.
Unfortunately, that’s not what happened. He played only four games in his second season because of two different suspensions. For what it’s worth, he was really good in those four games. After the suspensions, he had to apply for reinstatement to the NFL and was ultimately denied. Blackmon has had multiple arrests since then, making reinstatement unlikely. As recently as 2018, he was still on Jacksonville’s roster on the reserve list.