EntityQ2054666· pop 6· linked from 856 articlesUFC 137Sign in to saveUFC mixed martial arts event in 2011ConnectionsUFC on ESPN 44EntityFacebookConceptX (social network)ConceptLas VegasEntityLiverpoolEntitymixed martial artsEntityUltimate Fighting ChampionshipEntityDana WhiteEntityGeorges St-PierreEntityMirko Cro CopEntityParamount NetworkEntitypay-per-viewEntityNick DiazEntityDonald CerroneEntityEcho Arena LiverpoolEntityB.J. PennEntityThe Ultimate FighterEntityDennis SiverEntityCarlos ConditEntityCheick KongoEntityCategories2011 in mixed martial arts2011 in sports in NevadaOctober 2011 sports events in the United StatesUltimate Fighting Championship events at Mandalay Bay Events CenterUltimate Fighting Championship flagship events