Tai Tuivasa has experienced being the hammer many times in the octagon. At UFC on ESPN 42 , however, he got another dose of being the nail with a quick knockout loss. Tuivasa (15-5 MMA, 8-5 UFC) was halted by Sergei Pavlovich (16-1 MMA, 5-1 UFC) just 54 seconds into their heavyweight clash Saturday at Amway Center in Orlando, Fla. The Aussie got caught in the first exchange, then was battling to recover until some precise final shots from his opponent closed the show
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