The Philadelphia Flyers-Pittsburgh Penguins rivalry, also known as The Battle of Pennsylvania is a rivalry in the NHL's Atlantic Division. The rivalry began in 1967 when the teams were introduced into the NHL's "Next Six" expansion wave. The rivalry exists due to divisional alignment, and geographic locations, as both teams play in the state of Pennsylvania. The Flyers have generally dominated the series with a 134–86–30 record. However, the Penguins have knocked the Flyers out of the playoffs in 2008 and 2009, strengthening the rivalry. However, the two teams didn't meet each other during the Flyers Cinderella run of 2010. In the 2012 playoffs, the Philadelphia Flyers knocked off the Penguins in 6 games in a high scoring series.