On August 12, 1889 — 1889 – An 11 – 0 two-hitter by Elton Chamberlain completes a 3-game sweep for St. Louis (AA)‚ boosting the Browns’ lead over the Bridegrooms to 3 1/2 games. Total paid attendance is 32‚911.

Source:
Baseball Reference August 12
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game