Without seeing specifics I'm going to assume that your shutter speed is too slow to catch the action. Getting it fast enough for a night game is going to mean cranking the ISO up, which will introduce some noise, so make sure that you adjust the High ISO NR appropriately. Shoot in Aperture Priority mode with your Auto ISO set so that your minimum shutter speed is 1/250. Drop your aperture down to a click above maximum and have at it.