1867 – The Atlantics beat the Mutuals‚ 18 – 15‚ in the first match of the season series between the two clubs. George Zettlein pitches the win.

On August 12, 1867 — 1867 – The Atlantics beat the Mutuals‚ 18 – 15‚ in the first match of the season series between the two clubs. George Zettlein pitches the win.

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