In the NFL, we're not only limited to seeing epic sweeps, tackles, and TDs. In American football history, we won't forget the most surprising upsets that happened throughout the decades.

The underdog teams might be underwhelming during the regular season, but their determination to beat more successful teams is what sets them apart from the pack.

Kansas City Chiefs (Super Bowl IV)

Underdogs Who Shocked the NFL: How Lesser-Known Teams Pulled Off Underdogs Who Shocked the NFL: How Lesser-Known Teams Pulled Off
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In 1970, the Kansas City Chiefs delivered the upset of a lifetime in Super Bowl IV. As the juggernaut Minnesota Vikings boasted an unprecedented 12-2 record, the Chiefs went into the game as heavy underdogs. But with the power of a great defense and an offense that flowed so smoothly behind quarterback Len Dawson, they won 23-7 and showed the world the legitimacy of the AFL in the process of achieving their first Super Bowl title.

New England Patriots (Super Bowl XXXVI)

The 2001 New England Patriots etched their name in history with a shocking Super Bowl XXXVI win over the St. Louis Rams, famously dubbed "The Greatest Show on Turf."

Entering the game as 14-point underdogs, the Patriots relied on their young quarterback Tom Brady, and a disciplined game plan. A last-second field goal sealed their 20-17 victory, marking the start of a dynasty that would define the NFL for decades.

Jacksonville Jaguars (1996 Playoffs)

In only their second season in the NFL, the Jacksonville Jaguars produced one of the greatest upsets in league history. The Jaguars stunned the number one seed Denver Broncos in 1996 at Mile High Stadium by defeating them 30-27. They were off to the AFC Championship Game with this impressive victory, as they emerged as one of the most powerful forces in the NFL.

Tampa Bay Buccaneers (Super Bowl XXXVII)

Although they dominated on defense in the 2002 season, the Tampa Bay Buccaneers were the underdogs going into Super Bowl XXXVII against the Oakland Raiders.

With head coach Jon Gruden, who knew the Raiders' playbook like the back of his hand, the Buccaneers annihilated their opponents 48-21. The team's first Super Bowl championship came dramatically with the impenetrable defense, led by stars Derrick Brooks and Warren Sapp.

New York Giants (Super Bowl XLII)

The 2007 New York Giants engineered one of the greatest upsets in sports history during Super Bowl XLII. They were 12-point underdogs against the undefeated New England Patriots.

As quarterback Eli Manning led a clutch fourth-quarter drive, this game featured the iconic "Helmet Catch" by David Tyree. The Giants went on to win 17-14, ending the Patriots' perfect season and serving as an enduring symbol of grit and resilience.

These underdog teams remind us that in the NFL, anything is possible. Whether it's a Super Bowl shocker or a playoff stunner, these moments prove that determination, strategy, and belief can topple even the mightiest giants.