The Cardinals score nine runs in the 4th inning on their way to an 11 – 8 win over the Astros. Mark McGwire hits home run #56 on the season, and the 513th of his career. Big Mac passes Ernie Banks and Eddie Mathews on the all-time list.

On September 17, 1999 — The Cardinals score nine runs in the 4th inning on their way to an 11 – 8 win over the Astros. Mark McGwire hits home run #56 on the season, and the 513th of his career. Big Mac passes Ernie Banks and Eddie Mathews on the all-time list.

 


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Sources:
Baseball Reference September 17
National Pastime September 17
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game