On September 5, 1971 — In his major league debut, J.R. Richard throws a complete game in the Astros’ 5-3 victory over San Francisco at Candlestick Park. The 21 year-old right-handed fireballer strikes out a major-league rookie record 15 batters in his first major league appearance.

 


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Sources:
Baseball Reference September 5
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game