...this is one case where having the afternoon fixture helps those who would want to watch it in a bar/pub/restaurant/whatever - no competition (not like trying to get a Caps match on the bar's telly on a late March evening when the college hoop tournaments are on, or for that matter getting baseball on an NFL Sunday).
90 year old grandma isn't watching in a bar, she's going to miss the game. I'm sure that she isn't the only one, but I doubt if MLB or the Nats care since she's only been to one game and is hardly a target demographic.
If you are going to a bar I'd call ahead and have them verify that they get the MLB Network and that they know the channel number.