Original: In Game 4 of the Series, the Curse of the Billy Goat was allegedly laid upon the Cubs when P.K. Wrigley ejected Billy Sianis, who had come to Game 4 with two box seat tickets, one for him and one for his goat.
Simplified: During the 1945 World Series, a man by the name of Vasili "Billy Goat" Sianis attended Game 4 of the series with his pet goat.