Mark McGwire powers his 52nd homer in the Cards’ 9 – 3 win over Florida. It is his 590th career dinger and his 494th as a first basemen‚ surpassing Lou Gehrig.

This Day In Baseball

On September 1, 1999 — Mark McGwire powers his 52nd homer in the Cards’ 9 – 3 win over Florida. It is his 590th career dinger and his 494th as a first basemen‚ surpassing Lou Gehrig.

 

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Sources:
Baseball Reference September 1
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game