John Leonsor "J. L." Boake was an American professional baseball umpire in the National Association who umpired his only game on May 4, 1871, which was the first game in professional baseball league history. Boake was the home plate umpire when the Fort Wayne Kekiongas defeated the Cleveland Forest Citys, 2–0.
- Occupation
- baseball player
- Citizenship
- United States
- Born
- September 24, 1841
- Died
- July 22, 1912
