Mack Pendleton Allison (January 23, 1887 – March 13, 1964) was a professional baseball player whose career spanned 16 seasons, including three in Major League Baseball with the St. Louis Browns (1911–1913). Allison was a pitcher during his career. In his major league career, Allison compiled a record of 9–21 with a 3.17 earned run average (ERA), 17 complete games, one shutout, one save and 57 strikeouts in 45 games, 27 starts.

Alison also played in the minor leagues with the Class-D Columbus Discoverers (1908), the Class-D Shelbyville Grays (1909), the Class-A Buffalo Bisons (1909), the Class-D Richmond Pioneers (1910), the Class-B San Antonio Bronchos (1911), the Double-A Kansas City Blues (1913–1915), the Class-A New Orleans Pelicans (1915), the Class-A Little Rock Travelers (1916), the Class-A Mobile Sea Gulls (1916), the Class-A Sioux City Indians (1918–1919), the Class-A Des Moines Boosters (1919), the Class-A St. Joseph Saints (1920, 1925), the Class-B Bloomington Bloomers (1922), the Class-B Evansville Evas (1922), the Double-A Toledo Mud Hens (1922), the Class-A Waco Cubs (1925), the Class-A St. Joseph Saints (1925) and the Class-B Quincy Red Birds (1926).