5 biggest upsets in American sports history

24 September 2016: An Appalachian State Mountaineers helmet on the sideline prior to the NCAA Football game between the Appalachian State Mountaineers and Akron Zips at Summa Field at InfoCision Stadium in Akron, OH. Appalachian State defeated Akron 45-38. (Photo by Frank Jansky/Icon Sportswire via Getty Images)
24 September 2016: An Appalachian State Mountaineers helmet on the sideline prior to the NCAA Football game between the Appalachian State Mountaineers and Akron Zips at Summa Field at InfoCision Stadium in Akron, OH. Appalachian State defeated Akron 45-38. (Photo by Frank Jansky/Icon Sportswire via Getty Images) /
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24 September 2016: An Appalachian State Mountaineers helmet on the sideline prior to the NCAA Football game between the Appalachian State Mountaineers and Akron Zips at Summa Field at InfoCision Stadium in Akron, OH. Appalachian State defeated Akron 45-38. (Photo by Frank Jansky/Icon Sportswire via Getty Images)
24 September 2016: An Appalachian State Mountaineers helmet on the sideline prior to the NCAA Football game between the Appalachian State Mountaineers and Akron Zips at Summa Field at InfoCision Stadium in Akron, OH. Appalachian State defeated Akron 45-38. (Photo by Frank Jansky/Icon Sportswire via Getty Images) /

4. Appalachian State over Michigan

In the BCS era of college football, one loss to a team in one of the power conferences generally meant your season was over. If you lost to a low-level FBS school — or, God forbid, an FCS school — there was no climbing out of that hole.

In the 2007 season, Michigan entered with a preseason ranking of No. 5 and had national championship aspirations and expectations. Then on Sept. 1, 2007, they welcome a little school from Boone, North Carolina, to town.

When the Appalachian State Mountaineers rolled into Ann Arbor, no one thought they could beat Michigan. Then the game kicked off, and we realized the Wolverines were going to be in for a battle.

Michigan began the scoring early, and Appalachian State answered back. When it was 14-7 Michigan, Appalachian State reeled off 21 unanswered points to take a 28-14 lead. Michigan would have four of the next five scoring drives in the game and take a 32-31 lead. With :26 left Appalachian State capped off a drive with a field goal to take a 34-32 lead. After a bomb from Chad Henne to Mario Manningham, Michigan lined up for the game-winning field goal. Then this happened …

The ultimate shocker, and it ended Michigan’s hopes of a national title.