Seventeen-year-old girl Jackie Mitchell struck out Babe Ruth and Lou Gehrig in succession at an exhibition baseball game on April 2, 1931.
Soon afterwards, Ruth told a local newspaper that women should not be allowed to play baseball.
"I don't know what's going to happen if they begin to let women in baseball. Of course, they will never make good. Why? Because they are too delicate. It would kill them to play ball every day," he said.
The Commissioner of Baseball voided Mitchell's contract a few days later.
Major League Baseball banned women from playing in 1952.