A sports league is an organized group of teams or individuals that compete against each other in a specific sport. These leagues often have a set schedule of games or matches, and they may follow a particular format, such as round-robin or knockout. Examples of popular sports leagues include the National Football League (NFL) for American football and the English Premier League (EPL) for soccer. Leagues typically have rules and regulations to ensure fair play and maintain competitive balance. They may also feature playoffs or championships at the end of the season to determine the overall winner. Fans often support their favorite teams within these leagues, creating a vibrant community around the sport.