From The Fingerman via Deadspin:

I sat down to watch the game Saturday night and noticed something odd on the Nationals telecast. Up in the score box in the corner of the screen, the Nationals were identified with, as is customary, the abbreviation “WSH.” No problem there. But the Orioles were, strangely, not identified with “BAL” or “BLT.” No, they were identified by “O’s.” Even more amazing, when the line score was put up at the end of each half-inning, the teams were identified as “Orioles” and “Washington.”

Yes, this was the Nationals television broadcast and the graphics on the screen were essentially treating the Nationals as the opposing team—-and the Orioles as the “home” team.