Flyers–Penguins rivalry 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 ice hockey clubs. Both teams compete in the NHL's Eastern Conference Metropolitan 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 location, as both teams play in the Commonwealth of Pennsylvania. The Flyers and Penguins have met in the Stanley Cup playoffs four times in the last ten seasons from 2008–2018, strengthening the rivalry. The first
Ice hockey in the United States restricted to protect junior players' college eligibility). The Frozen Four is college hockey's national championship. Summer senior ice hockey is increasing in popularity in the 21st century, with Edina, Minnesota's Da Beauty League and Buffalo, New York's Fattey Hockey League both drawing NHL players who use the leagues to stay in shape during the offseason. Da Beauty League, established in 2016, is considered the nation's premier summer ice hockey league and benefits from corporate sponsorship from the Minnesota business community. A hockey tournament debuted in the summer Olympics in 1920. It would later be called the first World Ice Hockey