I'm not a sports fan of any sort... Eyeshield 21 is an Anime about football. But if te like sports animes and don't mind ones that aren't about football, I can think of: attraversare, croce Game (baseball), Prince of tennis (tennis :p), Slam Dunk (basketball), and Real manga (wheelchair basketball). Slam Dunk and Real are both da Takehiko Inoue. :)