The top welterweights in the world converge on the Bell Centre in Montreal on Saturday, March 16th, and it will be an unforgettable night of fights. In the UFC 158 main event, welterweight champion Georges St-Pierre faces his fiercest rival, Nick Diaz, in an anticipated showdown. Plus, another rivalry is born when “The Natural Born Killer” Carlos Condit faces 170-pound knockout artist Johny “Bigg Rigg” Hendricks.