UFC 155: Cain Velasquez dominates Junior Dos Santos to regain title

After over two years away from the octagon, Todd Duffee came back with a first-round knockout win over Phil De Fries.

Cain Velasquez became a two-time UFC world champion at UFC 155 when he avenged his only career loss to Junior dos Santos. Velasquez was shockingly dominant in victory, handing "Cigano" his first Octagon defeat.

After over two years away from the octagon, Todd Duffee came back with a first-round knockout win over Phil De Fries.

MMA Fighting's Ariel Helwani and Dave Doyle take a closer look at the top storylines for Saturday night's UFC 155.

Fresh off his dominant win over Junior dos Santos in the UFC 155 main event on Dec. 29, 2012, Cain Velasquez and his American Kickboxing Academy (AKA) training partner, Daniel Cormier, simultaneously (and publicly)