On John McGraw’s orders, umpire James Johnstone is refused admittance to the Polo Grounds, and the ump, standing outside the ballpark, forfeits the match to the Cubs. McGraw insists the game go on with a player from each team umpiring. McGraw picks reserve Sammy Strang, but Cubs manager Frank Chance refuses to go along, pointing out the game has already been forfeited.

On August 7, 1906 — On John McGraw’s orders, umpire James Johnstone is refused admittance to the Polo Grounds, and the ump, standing outside the ballpark, forfeits the match to the Cubs. McGraw insists the game go on with a player from each team umpiring. McGraw picks reserve Sammy Strang, but Cubs manager Frank Chance refuses to go along, pointing out the game has already been forfeited.

Source:
Baseball Reference August 7
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game