Just spent an hour with an CSR. Apparently the story goes that the local FSPT (693) and FSW (692) did not pick up the rights to the game, probably because it was a national game on NBCSN (220/1). DTV alleges the same thing happened in DETROIT.
Because the NBCSN blackout is from the league, and it assumes that the local sports channels (I am in SoCal) are going to carry, it killed the national feed in Socal and Detroit in spite of the fact that the locals did not pick up the broadcast.
This is a BIG mess for DTV and they say they are getting tons of calls about it.
I am betting this has to do with the fact that it was an extra game and the scheduling was not properly revised, and/or the memo between the NHL/NBC and the locals got lost in the shuffle. What a mess.