Sporting leagues are organized competitions where teams or individuals compete against each other in a specific sport. These leagues often have a set schedule of games or matches, and they may follow a round-robin format or a playoff system to determine a champion. Examples of popular sporting leagues include the National Football League (NFL) for American football and the English Premier League (EPL) for soccer. Leagues can vary in structure, size, and level of competition, ranging from amateur to professional levels. They typically have rules and regulations governing gameplay, player eligibility, and team conduct. Many leagues also feature a system of promotion and relegation, allowing teams to move between different levels based on their performance.