The City Series was the name of a series of intracity baseball games played between Major League Baseball's Philadelphia Athletics of the American League and its predecessors, and the Philadelphia Phillies of the National League that ran from 1883 through 1954. While the games were officially exhibitions, they were a matter of prestige in Philadelphia and a long rivalry existed between the players, management, and fans
The Athletics played the Phillies for the first time in interleague play in June 2003 at Veterans Stadium. The Phillies invited former A's Eddie Joost and Gus Zernial to the games. Connie Mack's daughter Ruth Mack Clark attended the first game. Former Florida U.S. Senator Connie Mack III, Mack's grandson, threw out the first ball.