With Junior Dos Santos being one of the most dominant champion in recent heavyweight history, so too is Cain Velasquez as one of the most dangerous number one contenders to ever grace the division.

They aren’t the only top contenders on the UFC 155 card this Saturday night at the MGM Garden Arena in Las Vegas. Watch the video preview below to view the stories of six men as their dominant career in the UFC has lead them to big fights on the last fight card of the year.

Video courtesy of the UFC