UFC 158

The main event was the culmination of the rivalry between Georges St-Pierre and Nick Diaz, with the latter having been vocal in wanting to fight the current champion for nearly two years.^{[3][4][5][6][7][8][9]}

A rematch between Alessio Sakara and Patrick Côté, from UFC 154, was briefly linked to this event. However, Sakara was forced out of the bout due to renal stress.^[10]

Sean Pierson was expected to face Rick Story at the event. However, Pierson pulled out of the bout citing an injury and was replaced by Quinn Mulhern.^[11]

Rory MacDonald was originally scheduled to face Carlos Condit in a rematch. However, on February 18, it was announced that MacDonald pulled out of the bout citing a neck injury. Condit instead faced Johny Hendricks, who was pulled from his bout with Jake Ellenberger.^[12] Ellenberger then faced returning veteran Nate Marquardt.^[13]

Mitch Gagnon was expected to face Issei Tamura at the event. However, Gagnon was forced out of the bout with an injury and was replaced by T.J. Dillashaw.^[14]

Johnny Eduardo was expected to face Yves Jabouin at the event. However, on March 6, Eduardo was forced to pull out of the bout citing a shoulder injury.^[15] Jabouin was then pulled from the card as a suitable replacement could not be found on short notice.^[16]

^[17]

Fighters were awarded $50,000 bonuses.^[18]

• Fight of the Night: Johny Hendricks vs. Carlos Condit
• Knockout of the Night: Jake Ellenberger
• Submission of the Night: Not awarded as no matches ended by submission.

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• 2013 in UFC