Oakland’s Bob Welch (20-4) wins his 20th game of the season, 8 – 3 over the Orioles. Mark McGwire hits his 31st homer and drives in 3.

On August 17, 1990 — Oakland’s Bob Welch (20-4) wins his 20th game of the season, 8 – 3 over the Orioles. Mark McGwire hits his 31st homer and drives in 3.

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Source:
Baseball Reference August 17
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
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