I never even thought about the local TV angle when it comes to airing games. It's already going to be tough for a league specific network to succeed, but when you take that into account, it makes it even tougher. The NFL Network benefited early on from being the only outlet available, but the same won't be the case for the MLB Network.
With everyone already basically trained to head to ESPN for Baseball Tonight, it'll be interesting to see if people give another network a shot.
MLB Network's Petitti: One On One About January Launch (CNBC)