The Pittsburgh Pirates moved to Exposition Park the following season. On April 24, 1891, Fred Carroll hit the first home run by a Pirate in the stadium. Under the management of Fred Clarke the Pirates won the National League pennant in 1901, 1902, and 1903. After the 1903 season, Dreyfuss and Boston Americans owner Henry Killilea organized a best of nine game series to match the two pennant winners against each other. The first World Series held three games in Boston before moving to Exposition Park with the Pirates leading the series 2–1. On October 6, 1903, 7,600 people attended the first World Series game in a National League stadium—the Pirates won by one run. The following day 12,000 people attended the game, forcing some spectators to stand behind a rope in the outfield. The Pirates lost three of four games at Exposition Park and eventually the Series.