UFC: Fight for the Troops 2 (also known as UFC Fight Night 23) was a mixed martial arts event held by the Ultimate Fighting Championship on January 22, 2011 at Fort Hood, near Killeen, Texas. The event was the third that the UFC has hosted in cooperation with a US military base, following UFC Fight Night 7 and UFC: Fight for the Troops.

The bout between Kenny Florian and Evan Dunham was expected for UFC 126, but was moved to this card to serve as the main event. On December 6, however, Florian pulled out of the bout due to a knee injury. Melvin Guillard was pulled from a planned preliminary bout with Yves Edwards and faced Dunham in the main event. Edwards instead faced TUF 12 alumnus Cody McKenzie.

On December 30, 2010, a bout between Mike Swick and David Mitchell was called off due to Mitchell suffering an injury and Swick dealing with his Esophageal Condition. A late replacement fight between Will Campuzano and Chris Cariaso was signed.

A lightweight bout between Cole Miller and Matt Wiman, which was originally scheduled to take place at UFC 125, was moved to this event.

Rani Yahya was expected to face Chan Sung Jung at this event, but Jung was forced from the card with an injury, and replaced by Mike Brown.

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