On June 3, 1921 — Crip Polli strikes out 28 batters in a ten-inning contest against Cushing Academy at Mountaineer Recreation Field in Montpelier, Vermont. The Goddard Seminary student’s performance, highlighted in Ripley’s Believe It or Not, is no fluke as the high schooler will fan 105 batters in a five-game span.

Source
Baseball Reference June 3