Strikeouts in a professional game: Ron Necciai, 27
The 19-year-old minor leaguer recorded every out via strikeout in his 1952 no-hitter. It's believed to be the only nine-inning, 27-strikeout performance in professional baseball history. Necciai, playing for the Pirates' Class-D Appalachian League affiliate, followed it up with a 24-strikeout two-hitter in his next start. But he lasted less than two months in the majors, going 1-6 with a 7.08 ERA.