Ka cika wannan magana: An haifi Deegan a Camden, New Jersey. Ya fara aikinsa a gasar Midwest League a shekara ta. Ya kuma yi aiki a Carolina da Kudancin Kudancin kafin ya zama babban dan wasa a gasar. A cikin majors, ya yi aiki a cikin jerin Gasar Championship na Amurka guda hudu: 1970 (Game One kawai), 1974, 1977 da kuma
Shekara ta 1984. Ya kuma yi hukunci a cikin Wasannin All Star na 1978 da kuma Wasannin Wasannin Duniya na 1976; shi ne alkalin wasa na gida don Wasannin Hudu na Wasannin, wanda Cincinnati Reds suka yi nasara a kan karfin Johnny Bench na gida biyu, wasan RBI biyar don kammala gogewar New York Yankees. A wannan wasan, alkalin wasa na farko Bruce Froemming ya fitar da manajan Yankees Billy Martin bayan Martin ya jefa kwallon baseball a Deegan.