#3 The Fabulous Kangaroos (WWWF United States Tag Team Championship, 409 days)
Unknown to many modern WWE fans, The Fabulous Kangaroos were a very famous and talented act that graced WWE rings when the company was known as the World Wide Wrestling Federation, back in the 1950s and 1960s.
At that time, WWE's premier Tag Team titles were the United States Tag Team Championships, which the Kangaroo's held on three occasions. Their longest reign, which lasted a whopping 409 days, began when they defeated the team of Johnny Valentine and Buddy Rogers (who would later become the inaugural WWE Champion) and finally ended when they dropped the belts to Valentine and his new partner, Bob Ellis.
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The Kangaroos were enshrined into the Wrestling Observer Newsletter Hall of Fame in 1996 and the Professional Wrestling Hall of Fame in 2003, but are conspicuous by their absence in the WWE Hall of Fame.