Soccer, rugby, and American football are three such sports that have captured the attention of millions of people worldwide. While all three sports have their unique fan base, there are certain factors that differentiate them in terms of popularity.

Soccer, also known as football, is the most popular sport globally, with an estimated 4 billion fans worldwide. Its popularity can be attributed to several factors, including the simplicity of the game, the low cost of equipment and infrastructure, and the ease of accessibility. Soccer is played in almost every country in the world, and its biggest event, the FIFA World Cup, is the most widely viewed sporting event worldwide, with an estimated 3.5 billion viewers.

Rugby, on the other hand, has a more niche following, particularly in countries such as New Zealand, South Africa, and Australia. However, its fan base is still significant, with an estimated 800 million followers worldwide. Rugby's popularity can be attributed to its physicality and intensity, which make it a thrilling and exciting sport to watch. The Rugby World Cup is the biggest event in the sport, and while it may not have the same viewership as the FIFA World Cup, it still has a significant following in countries where the sport is popular.

American football is the most popular sport in the United States, with an estimated 37% of Americans identifying it as their favorite sport. The sport's popularity can be attributed to its high-octane and physical nature, which makes it a thrilling sport to watch. The Super Bowl, the championship game for American football, is one of the most-watched sports events in the United States, with an estimated 100 million viewers annually. While American football may not have the same global following as soccer, it has a growing international fan base, particularly in countries such as Canada, Mexico, and Japan.

Ultimately, the popularity of these sports varies depending on several factors, including culture, tradition, and accessibility. While soccer may be the most popular sport globally, rugby and American football have their niche followings, which make them equally exciting to watch. Whether you're a fan of soccer, rugby, or American football, there's no denying the passion and excitement that these sports bring to millions of people worldwide.