Wikipedia includes a list of unusual deaths. An excerpt:
1920: Baseball player Ray Chapman was killed when he was hit in the head by a pitch. He remains the only Major League Baseball player to date to have been killed in a game.1923: Frank Hayes, jockey, suffered a heart attack during a horse race. The horse, Sweet Kiss, went on to finish first, making Hayes the only deceased jockey to win a race.
1925: Zishe (Siegmund) Breitbart, a circus strongman and Jewish folklore hero died during a demonstration in which he drove a spike through five one-inch thick oak boards using only his bare hands when his knee was accidentally pierced. The spike was rusted and caused an infection which led to fatal blood poisoning. He was the subject of the Werner Herzog film, Invincible.