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Karlos Vemola has suffered an injury and is off the UFC 155 card, replacing him against Chris Leben will be Derek Brunson. Leben competes for the first time since UFC 138 as he failed a post-fight drug test and was promptly suspended by the UFC. Brunson enters the fight riding a two fight losing streak and will be making his UFC debut at the year-end card. UFC 155 takes place on December 29th from the MGM Grand Garden Arena in Las Vegas, Nevada with Junior Dos Santos and Cain Velasquez headlining.
