That's right. Ralph and Razor will not be on television for the Stars-Colorado game on March 14 at American Airlines Center. The game was originally slated for NBC, but the network has flex scheduling and (not surprisingly) chose a different game for Sunday.
If you have Center Ice, the blackout lifted in Dallas. So you can see the Stars game, but you'll have to do it via the Colorado feed.
So no Stars game on Sunday. That will certainly be strange (though I have DirecTV, so it will be just like Monday when I missed the Stars-Capitals game).