From BR Bullpen
John Roy Brock
- Bats Right, Throws Right
- Height 5' 6½", Weight 165 lb.
- Debut August 10, 1917
- Final Game September 2, 1918
- Born October 16, 1896 in Hamilton, IL USA
- Died October 27, 1951 in Clayton, MO USA
 Biographical Information
John Brock got a couple shots at the majors at a young age. He broke in with the 1917 St. Louis Cardinals at the age of 20, hitting .400 in 15 at-bats and playing catcher. He made one error in the field in the four games he caught.
His batting average was below that of the other two catchers, and his fielding percentage was also, and there was a new manager in 1919, so he didn't stay. Nor, for that matter, did first-string catcher Mike Gonzalez, who moved to the New York Giants but eventually came back to play again for the Cardinals.
Although Brock had a short career, he once pinch-hit for pitcher Earl Howard in Howard's only game in the bigs, thus depriving Howard of his only chance at a major league at-bat. See SABR Biography of Earl Howard.