Umpire Tim Hurst is dropped by the American League following an investigation into the spitting incident in the August 3rd game between the Athletics and White Sox. His replacement is Mike Thompson, a former Georgetown University football player who has been a well-known football referee. Thompson tried to join the National Leagueumpiring staff last year but the roster was filled.

On August 12, 1909 — Umpire Tim Hurst is dropped by the American League following an investigation into the spitting incident in the August 3rd game between the Athletics and White Sox. His replacement is Mike Thompson, a former Georgetown University football player who has been a well-known football referee. Thompson tried to join the National Leagueumpiring staff last year but the roster was filled.

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