Multi Blog Pages

sportsranters.com is a sports web page where the fans are the bloggers. So far we have been off to a pretty good start. As we grow and the blogs becoem more and more I was wondering if there was a way to make different pages for each catagory. For example can I have an NFL page where any post the is put into the NFL catagory will appear on that page, of MLB, or NBA. Right now everythign just goes to one page all fan posts all user posts. Thoughts ideas suggetions help please thank you!!!