I have seen many sport apps to watch matches too - baseball, football, even australian rugby by these guys but nothing to watch coftball games. Don't you know if ESPN for X-Box worth it? I am thinking of subscribing.
I like iScore better than GameChanger too. It is surprising that it has only five reviews on App Store.
I am also a rugby fan. And there is amazing app called Couch Call by this publisher. You can watch matches, see the results, chat with other fans and so on. I wish threre was something...