Derek Brunson will make his UFC debut later this month, as the former Strikeforce fighter plans to take on Chris Leben at UFC 155: Dos Santos vs. Velasquez II. Brunson replaces Karlos Vemola, who suffered an injury in training recently.
UFC 155 takes place December 29 from Las Vegas. In the main event, Junior dos Santos defends his UFC heavyweight title against Cain Velasquez.
Brunson (9-2) has lost his previous two fights, falling to Kendall Grove and Ronaldo "Jacare" Souza. He attempted to compete on the upcoming season of The Ultimate Fighter, but was pulled by Showtime after making the final cut.
The bout is expected to begin the pay-per-view main card.
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