As Gil said, "crappy" is meaningless. Can you share one of your photos or go in to detail about what is wrong with them? Also remember it takes practice to get good at this, I don't regularly shoot that kind of thing so my first few times shooting may not yield much to be proud of but after a few goes I'll get back in to the mood and get the feel for it again and I'll shoot consistently better photographs. For some people that's just how it is.
A tripod can't hurt, but you're probably fine on shutter speeds so that's likely not that big of a problem right now. What you need is a longer lens. I'd prefer at least 200mm, but for relatively little damage to your wallet you can get a 75-300mm lens (or something similar) for under $200. These aren't the best lenses in the world but they're affordable and will let you get closer to the action. You'll probably want to bump the ISO up in order to maintain fast enough shutter speeds to minimize motion blur.
Also with a lens like that, a tripod really is a good idea. You don't need to spend a lot on a tripod either, but if you have an idea of a budget, and have some room to spare I really recommend getting a bit more tripod than the bargain ones you get at Target or WalMart. Ultimately though, you can get sufficient tripod to get you started for around $100, I wouldn't really go much lower than that and I'd suggest spending a bit more.
If you provide a budget I can give you better suggestions but I'd really recommend starting with a tripod like this:
http://www.bhphotovideo.com/bnh/controller/home?O=productlist&A=details&Q=&sku=222200&is=REG&addedTroughType=categoryNavigationor even this:
http://www.bhphotovideo.com/bnh/controller/home?O=productlist&A=details&Q=&sku=319528&is=REG&addedTroughType=categoryNavigationThe second one has what is called a "ball head" which some people find easier to use and to allow faster changes to position on the fly. That certainly isn't high end gear but bogen/manfrotto is quality made equipment that will last much longer and serve you much better than some of the bargain stuff you can find. Tripods can cost much more than that (I just spend $340 on a ballhead alone, nevermind legs or the mounting plates).
I'd say you're looking at a total cost of somewhere around $300 for a 75-300mm zoom lens (start with the Canon made lenses, and then look at Sigma and Tamron as well, look for reviews online) and a tripod such as that and it'll be a good place to get started. You can always replace the lens, but you probably won't find yourself needing to replace a tripod like that for quite a while, if ever. It all depends on how seriously you get yourself involved in photography.