Alls well that ends for Derek Brunson. Months after he was pulled off The Ultimate Fighter season 16 right before filming began due to a contractual issue with Showtime, the now former Strikeforce middleweight has agreed to step up on short notice to fight Chris Leben on Dec. 29 in Las Vegas. A slot opened up for Brunson after Karlos Vemola, Lebens original opponent, withdrew from the fight due to an injury. Brunson (9-2) will look to get back on the winning track after going 0-2 in 2012, thus far. He lost to Kendall Grove via controversial split decision in June and was then knocked out in just 41 seconds by Ronaldo Jacare Souza in August.