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LAS VEGAS, NV - JULY 11: (L-R) Robbie Lawler punches Rory MacDonald in their UFC welterweight title fight during the UFC 189 event inside MGM Grand Garden Arena on July 11, 2015 in Las Vegas, Nevada. (Photo by Christian Petersen/Zuffa LLC/Zuffa LLC via Getty Images)

LAS VEGAS, NV - JULY 11: (L-R) Robbie Lawler punches Rory MacDonald in their UFC welterweight title fight during the UFC 189 event inside MGM Grand Garden Arena on July 11, 2015 in Las Vegas, Nevada. (Photo by Christian Petersen/Zuffa LLC/Zuffa LLC via Getty Images)
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UFC Christian Petersen