Number of Games in a Baseball World Series Based on past results found in the Information Please Almanac, there is a 0.1809 probability that a baseball World Series contest will last four games, a 0.2234 probability that it will last five games, a 0.2234 probability that it will last six games, and a 0.3723 probability that it will last seven games. Is it unusual for a team to “sweep” by winning in four games?