LAS VEGAS, NV - FEBRUARY 04:  Fabricio Werdum (left) headkicks Roy Nelson during the UFC 143 event at Mandalay Bay Events Center on February 4, 2012 in Las Vegas, Nevada.  (Photo by Nick Laham/Zuffa LLC/Zuffa LLC via Getty Images) *** Local Caption *** Fabricio Werdum; Roy Nelson
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