2. Cam Newton
There’s no denying that Newton didn’t live up to his full potential. The former MVP was outstanding in his first few seasons for the Panthers. He set a number of rookie records but couldn’t sustain his brilliance. Injuries wrecked his career and left him on the sidelines. It’s a shame because he had the potential to be one of the greatest rushing quarterbacks of all time.
He played for the Patriots in 2020 and fans saw how his body betrayed him. Meanwhile, he made some poor decisions off the field that caused the team management to lose faith in him. They cut him and replaced him with rookie Mac Jones (via Boston Globe). Newton could have been a truly special QB but he never sustained in his place in the top-tier. Nobody saw this coming after his stunning 2015 season.