Philadelphia Phillies | 82,580 followers on LinkedIn. The Philadelphia Phillies are a Major League Baseball club based in Philadelphia, Pennsylvania. Formed in 1883, the Phillies are the oldest, continuous, one-name, one-city franchise in all of professional sports. Throughout the years, the club has called various stadiums their home, the most notable being Connie Mack Stadium and Veterans Stadium, before finally settling into Citizens Bank Park in 2004.