#15: High School Football Team, the 1910s

This photo of a high school soccer team from the early 1910s is a testament to the roots of American football, which evolved from a combination of soccer and rugby. The first football game was played on November 6, 1869, between Rutgers and Princeton, two college teams.

The National Football League (NFL) was originally established in 1920 as the American Professional Football Association, with just 11 teams. Today, the NFL has grown to become one of the most lucrative and successful sports leagues in the world, with millions of fans tuning in to watch the games each week.