Sgt.Mcullin is seen in Call of Duty 3.
He's the American commander for the first 3 levels as the Americans,in till he dies when a mortar hit him,but he defused bomb and said his last words to Cpl.Mike "Dix" Dixon. Mcullin said," Tell Guzzo...tell him...tell him to go to hell...(laughs and then dies)." As for as we know Mcullin was once a enginer and was a carrer solider. He was from Chiago and he was 37 when he died.