The NFL consists of a handful of teams such as the New England Patriots or Atlanta Falcons that have been flirting with Super Bowl contention. However, they typically have a small window where they must capitalize on their opportunity to win a Lombardi Trophy.
There are a series of reasons why a team could just drop off from the elite stack of the league and it usually happens to everyone. Just look at the Oakland Raiders who actually played in the 2002 Super Bowl and subsequently was one of the worst teams in the entire league.
That being said, here's five teams that must win now or get knocked out of contention by 2015.