If you still shoot with film, there are a host of high ISO films that will fit your needs nicely. Fuji's Neopan 1600 is an excellent black and white film for shooting nighttime football and if you don't like the idea of pushing films, it's an excellent choice. Many photographers "push" their films in this type of lighting and action situation. Depending on what you want as an end result, this may or may not be the way for you to go. Pushing is intentionally underexposing your film and then compensating by overdeveloping it. In most cases, black and white and slide film push better than color negative film and if you're not processing the film yourself, you'll need customized processing from your lab. Be sure to tell them that the film has been pushed before processing; otherwise it will be underdeveloped and unprintable. If you'd rather "push" a slower film, Kodak's good old stand-by, Tri-X, pushes very well and has excellent grain structure if processed correctly. Pushing film will always add grain and contrast and shooting in less than ideal conditions will also degrade the image even more, so if you are shooting nighttime football, understand that the pros grapple with image quality issues in this type of environment as well and it will never look as good as images shot under ideal conditions. Remember to make sure you've got a lab that can push your film before you shoot the game!