Yuneisy Duben dropped the UFC brass’ jaws collectively Tuesday when she pulled off a massive upset in emphatically violent fashion at Dana White’s Contender Series 70 . A +837 underdog across major online sports books (per BestFightOdds), Duben (6-0) knocked LFA flyweight champ Shannon Clark (5-1) stiff with a big punch at the 1:13 mark of Round 1 at the UFC Apex in Las Vegas.