Honestly, in my experience I find that it's technique first, lens second, camera third.
If you want good pics of any sport, the right technique is the key...also, understanding the sport you are shooting so you can get the timing down I've found to be key.
Second, the lens is a much more limiting factor than the body. A 70-200 (f4 if shooting day games, f2.8 if shooting evening or night) should be sufficient IF you are close to the action (on sidelines/first 5 rows).
Third, if the camera body has a decent AF system you may get more keepers. But without the right technique and/or lens, even the fanciest body won't give you the shots you want.