four games to one in the World Series in October 1969. Divisional membership Current members Arizona Diamondbacks - Joined in 1998 as an expansion team Colorado Rockies - Joined in 1993 as an expansion team Los Angeles Dodgers - Founding member San Diego Padres - Founding member San Francisco Giants - Founding member Former members Atlanta Braves - Founding member - moved to the NL East in 1994. Cincinnati Reds - Founding member - moved to the NL Central in 1994. Houston Astros - Founding member - moved to the NL Central in 1994, then to the AL West in 2013. Division lineups Place cursor over year for division champ or World Series team. The creation of the division with the expansion of the league - with the Padres added. With the Rockies added as an expansion team. With the Braves moved to Eastern Division and the Reds and the Astros moved to the Central Division With the Diamondbacks added as an expansion team. Division champions Before the forming of a third division in both leagues in 1994, the winners of each division competed in a best-of-five series, with the series being lengthened by two possible games in 1985 to a best-of-seven series, dubbed the "League Championship Series" to determine the winner of the league pennant. This format was to be changed in 1994, though it was not carried out until 1995 due to the 1994–95 Major League Baseball strike that started on August 12, 1994. There was the addition of two further teams in the playoffs in each league. This has led to the creation of a "Division Series" round of the playoffs, in which two best-of-five series are conducted to determine the participants of the League Championship Series. As before, the winners of each league's pennant compete in the best-of-seven World Series to determine the champion of Major League Baseball. Team names link to the season in which each team played * – Defeated the Los Angeles Dodgers in a one game playoff for the division title, 7–1. ** – Defeated the Colorado Rockies in a one game playoff for the division title, 5–2. † – Due to the 1981 Major League Baseball strike, the season was split. Los Angeles won the first half and defeated second-half champion Houston (61–49) in the postseason. The Cincinnati Reds had the best record in the division (66–42) overall but due to