In the second game at Boston‚ Boston Nationals Joe Stanley clouts his first major league homer‚ a grand slam off Chicago’s Jock Menefee. Stanley will hit his second career homer in 1905‚ again a grand slam. Pat Moran also hits a grand slam as Boston wins‚ 11 – 10‚ with Pop Williams beating Menefee. Chicago wins the opener‚ 7 – 4‚ with slow Bob Wicker outpitching Togie Pittinger.

On August 12, 1903 — In the second game at Boston‚ Boston Nationals Joe Stanley clouts his first major league homer‚ a grand slam off Chicago’s Jock Menefee. Stanley will hit his second career homer in 1905‚ again a grand slam. Pat Moran also hits a grand slam as Boston wins‚ 11 – 10‚ with Pop Williams beating Menefee. Chicago wins the opener‚ 7 – 4‚ with slow Bob Wicker outpitching Togie Pittinger.

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