#1 The Undertaker (6 Days)
6 days?! Yes, believe it or not, The Undertaker once lay claim to one of the shortest WWE championship runs in history.
At Survivor Series 1990, The Undertaker debuted and quickly made a name for himself as a disturbing powerhouse in the WWE. His spine-tingling aura and chilling entrances were only matched by his athleticism in the ring, and it was obvious he was there to make a name for himself, under the watchful eye of his manager, Paul Bearer.
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A mere year later and The Deadman wound up pinning none other than the immortal Hulk Hogan (albeit under strange circumstances thanks to outside interference from Nature Boy Ric Flair) to capture his first taste of WWE Championship gold.
However, Hulk Hogan was still riding high as the most popular Superstar in the company, and it would only take six days for the Hulkster to get his revenge and reclaim the title he lost less then a week earlier.
Did this unceremonious loss hurt the Undertaker's career? Absolutely not. If we have seen the last of the man known as Mark Callaway, he goes out as one of the very best to ever step between the ropes.