You could also use SportsAlert - Get free text message sports score updates on your cell phone
once you create an account you can pick your teams in any sport, and pick how often to be notified. For example you can choose at the any score change, end of each quarter of just final score, etc. for football. For MLB you can choose end of the 3rd, 6th, and 9th innings, or just final scores,etc. Sports alert is free, and it send you a text message for the score updates.