Gregory Thomas "Moe" Mulleavy (September 25, 1905 – February 1, 1980) was an American professional baseball shortstop, manager, coach, and scout. Born in Detroit, Michigan, his father, Thomas, was a machinist in a Detroit automobile factory, having moved from Canada to the United States in 1903 with his wife, Bertha (Freytag) Mulleavy. Gregory was born on September 25, 1905, their elder child. A daughter, Eleanor, was later born.[1] He attended the University of Detroit Jesuit High School and Academy prior to beginning his baseball career in 1927.