William Thomas Turner Grieve (April 25, 1900 – August 15, 1979) was a professional baseball umpire who worked in the American League from 1938 to 1955. Grieve umpired 2,783 major league games in his 18-year career. He umpired in three World Series (1941, 1948 and 1953 and two All-Star Games (1941 and 1949).