A beginner's betting guide to the Australian Football League If you’re a fan of fast-paced and thrilling sports, then you’re in for a treat with the Australian Football League (AFL). The AFL is a popular professional sports league in Australia that features the unique and exciting sport of Aussie rules football. Learn more about it and dive right into the thrill of AFL with this AFL betting guide: Key takeaways Aussie rules football has two teams with 18 players each from the country’s mainland states.