On April 29, 1986 , Roger Clemens of the Boston Red Sox sets a major league record by striking out 20 batters in a 3-1 victory over the Seattle Mariners. The 23-year-old Clemens surpasses the record of 19 strikeouts shared by Hall of Famers Steve Carlton, Nolan Ryan, and Tom Seaver . In 111 years of
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Source: Historical record