Flyers–Penguins rivalry

The Flyers–Penguins rivalry, also known as the Battle of Pennsylvania, is a National Hockey League (NHL) rivalry between the Philadelphia Flyers and Pittsburgh Penguins. Both teams compete in the Metropolitan Division of the Eastern Conference. The rivalry began in 1967, when teams were introduced into the NHL's "Next Six" expansion wave. The rivalry exists due to divisional alignment and geographic location, as both teams play in the state of Pennsylvania. The Flyers and Penguins met in the Stanley Cup playoffs four times in 11 years from 2008 to 2018, strengthening the rivalry.