Kammala jumla mai zuwa: A cikin kakar 2011-12 Campbell ya cancanci zuwa shida daga cikin abubuwan da suka faru na takwas. Sakamakonsa mafi kyau na kakar wasa shine 16 na karshe a cikin
Australian Goldfields Open, inda ya rasa 1<unk>5 ga Mark Allen, kuma a gasar Open ta Duniya, godiya ga Ali Carter ya janye daga taron, kafin Graeme Dott ya ci shi 3<unk>5.