Jack O'Brien (o'brija02)
John Joseph O'Brien
- Bats Left, Throws Right
- Height 6' 1", Weight 165 lb.
- Debut April 14, 1899
- Final Game September 28, 1903
- Born February 5, 1873 in Watervliet, NY USA
- Died June 10, 1933 in Watervliet, NY USA
Jack O'Brien was the first pinch hitter in the history of the World Series. He struck out for Boston Americans catcher Lou Criger with two men on in the 9th inning of Game 1 of the 1903 World Series against the Pittsburgh Pirates. It was his last major league appearance.
O'Brien played three seasons in the majors, and at least from 1895-1905 in the minors when he wasn't in the majors. He played at least five years in the Eastern League and at least three years for teams based in Milwaukee, WI. He was the star of the Milwaukee Creams team of the Western League in 1902, hitting .341 while player-manager Hugh Duffy hit .291.