started when the Pittsburgh Pirates entered National League play in their fifth season of 1887, four years after the Phillies. The Phillies and the Pirates had remained together after the National League split into two divisions in 1969. During the period of two-division play (1969–1993), the two National League East division rivals won the two highest numbers of division championships, reigning exclusively as NL East champions in the 1970s and again in the early 1990s, the Pirates nine, the Phillies six; together, the teams' 15 championships accounted for more than half of the 25 NL East championships during that span. After the Pirates moved to the National League Central in 1994, the teams face each other in only two series each year and the rivalry has diminished. However, many fans, especially older ones, retain their dislike for the other team and regional differences between Eastern and Western Pennsylvania still fuel the rivalry. The rivalry between the Philadelphia Flyers and the Pittsburgh Penguins in the National Hockey League is also fiercely contested. Historical rivalries City Series: Philadelphia Athletics The City Series was the name of a series of baseball games played between the Philadelphia Athletics of the American League and the Phillies that ran from 1903 through 1955. After the A's move to Kansas City, Missouri in 1955, the City Series rivalry came to an end. The teams have since faced each other in Interleague play (since its introduction in 1997) but the rivalry has effectively died in the intervening years since the A's left Philadelphia. In 2014, when the A's faced the Phillies in inter-league play at Oakland Coliseum, the Athletics did not bother to mark the historical connection, going so far as to have a Connie Mack promotion the day before the series while the Texas Rangers were in Oakland. The first City Series was held in 1883 between the Phillies and the American Association's Athletics. When the Athletics first joined the American League, the two teams played each other in a spring and fall series. No City Series was held in 1901 and 1902 due to legal warring between the National and American Leagues. Roster Team records Team managers Over 126 seasons, the Phillies' franchise has employed 55 managers. The duties of the team manager include team strategy and leadership on and off the field. Seven managers have taken the Phillies to the postseason, with Danny Ozark and