1880 – After 21 consecutive victories at home‚ Chicago suffers its first defeat at Lake Front Park this season‚ losing to Providence, 6 – 4. The White Stockings had not lost a National League game at home since August 25‚ 1879.

On August 12, 1880 — 1880 – After 21 consecutive victories at home‚ Chicago suffers its first defeat at Lake Front Park this season‚ losing to Providence, 6 – 4. The White Stockings had not lost a National League game at home since August 25‚ 1879.

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