Can you tell me about the history of sports in Philadelphia?

Philadelphia is one of thirteen cities that hosts teams in the "Big Four" major sports leagues in North America, and Philadelphia is one of just four cities in which one team from every league plays within city limits. These major sports teams are the Philadelphia Phillies of Major League Baseball (MLB), the Philadelphia Eagles of the National Football League (NFL), the Philadelphia 76ers of the National Basketball Association (NBA) and the Philadelphia Flyers of the National Hockey League (NHL). Each team has played in Philadelphia since at least the 1960s, and each team has won at least two championships. Since 2010, the Greater Philadelphia area also has been the home of the Philadelphia Union of Major League Soccer (MLS), making the Philadelphia market one of only nine cities that hosts a team in the five major sports leagues. Prior to the 1980s, Philadelphia was home to several other notable professional franchises, including the Philadelphia Athletics, the Frankford Yellow Jackets, the Philadelphia Warriors, the Philadelphia Quakers, Philadelphia Atoms, and the Philadelphia Field Club.

Philadelphia host teams in the 4 major sport leagues. Over the years, there has been varying success from the teams. In some years, there have been teams at the bottom of the league. Most years, teams are within reach of the league championship. Philadelphia Phillies and Philadelphia Eagles have been teams with the most success with both teams ending as runner up to the league championship. The Philadelphia Sixers has been a top tier team but has not been able to get past the second round of playoffs in the last few years. Philadelphia sports fans are notoriously loyal, demanding of their players and aggressive against fans of opposing team fans.