Super Bowl IV - Chiefs vs. Vikings - Top 10 Biggest Super Bowl Underdogs - Photos

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100 Memorable Olympic Moments

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Even though the Jets had beaten the Colts in the previous Super Bowl, people still thought the AFL couldn't compete with the NFL, and the Vikings were favored by about two touchdowns. Buch Buchanan and the Hall of Fame-laden Chiefs defense completely dominated Minnesota in a 23-7 win that permanently put to rest the idea the AFL couldn't compete with the NFL. The leagues merged the following season.

Photo: Walter Iooss Jr./SI