7. Brett Favre
Favre’s inclusion on this list is controversial because he is a Super Bowl winner. However, his playoff meltdowns are the stuff of legend. He left the Packers after a late interception lost his team the game. The Giants scored from the resulting field goal. But this wasn’t the exception to the rule. Favre failed to deliver in the postseason on multiple occasions (via Bleacher Report).
Everybody loves a quarterback duel but Favre couldn’t handle the pressure against Kurt Warner. He threw a scandalous six interceptions in the NFC playoffs against the Rams in 2002. As one of the greatest quarterbacks of all time, this was ridiculous. Meanwhile, the Vikings also embarrassed him in 2005 as he threw four interceptions. The list goes on and on.