In the movie Field of Dreams, there is a character named "Moonlight" Graham who plays a significant role in the storyline. Graham was a doctor who, as a young man, played in one major league baseball game, but never got a chance to bat. Part of the story involves getting Graham his one at-bat.
Many people, like myself, thought that Graham (played by Burt Lancaster in his last big-screen role) was a fictional character. However, he was a real person and the Minnesota Twins will honor him with "'Moonlight' Graham Day" today on the 100th anniversary of his lone baseball game.
Graham died in 1965 at the age of 88.