Could Junior Dos Santos Outbox Wladimir Or Vitali Klitschko? Dos Santos Faces Cain Velasquez At UFC 166 Saturday

UFC heavyweight combatant Junior Dos Santos figures to have his hands and feet full Saturday night when he steps into the cage with Cain Velazquez for the pair's third showdown, but in the buildup Dos Santos made an odd challenge to fighters who ply their trade in a different ring.