Mulligan was an outstanding pitcher for three years with the Crusaders. Pitching for HC teams which were consistently among the best in the East, he compiled a career record of 17-7 with 182 strikeouts in 169 2/3 innings. Mulligan was 5-2 as an 18 year old sophomore and then 7-4 as a junior, opening the season with a 6-0 victory at Brown, a masterpiece that included 16 strikeouts. A broken thumb held him back at the beginning of his senior year, but he came back to compile a 5-1 record. After graduation, Mulligan had an eight-year pro career. His only season in the majors was in 1934 with the Red Sox, when he went 1-0 with 3.63 ERA in 44 innings. He passed away in 1986.