Interleague play
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.