The DirecTV website indicates that:
The 17628 ZIP Code is in the home team territory for the following pro teams. With HD Access select channels and teams available in HD are noted below:
Mid-Atlantic Sports Network HD
Comcast SportsNet Mid-Atlantic HD
- Washington Capitals
ROOT Sports Pittsburghhttp://cdn.directv.com/images/global/lightbox/icon_hd_channel.png
- Pittsburgh Penguins
I think you're missing something here. Even though MASN is not his "home RSN" anymore, by subscribing to sports pack he should receive MASN and Orioles games, according to John Metzgar's post above. Much cheaper than Extra Innings, which wouldnt get you the games anyways if his town is claimed by the Orioles. Worth a try at least.
Wrong ZIP. Try 17268.