6. Adrian Peterson
Peterson is a future Hall of Famer. His list of personal accolades includes an NFL MVP award and six Pro Bowl appearances. Furthermore, his longevity is ridiculous for a running back. Peterson spent the bulk of his career with the Minnesota Vikings before a tour of the NFL. However, it’s arguable that he failed to deliver in the postseason.
Indeed, it’s not entirely his fault but his playoff experience is miserable. In 16 seasons, with 6 franchises, he’s only been to the postseason on four occasions (via Star Tribune). Peterson made the championship game once and scored three touchdowns but his team lost the game. He wasn’t able to make a difference in other playoff games as the Vikings’ hopes ended early.