Except if a local channel or national channel bought rights to the game, or its blacked out due to not selling out. RSNs can carry the event, but can be superseded by locals, just like nationals can purchase the event, but be superseded by regional providers and/or locals.
Official line (sorry for using it): "Our agreements with broadcasters require us to blackout some sporting events from time to time. These blackout rules are controlled by the leagues, sports associations, and networks that purchase the rights to the broadcasts. Often if a game is blacked out on one of DISH Network's channels, you may be able to view the game on another DISH Network or local broadcast channel."
Football is a big time when that happens around here, and I am not sure now that Root is around the kind of blackout restrictions we will see. The second Rockies/Dodgers game was blacked out on Root but the game was still showing it was aired on Root RM. Perhaps outside of the DMA someone with MSP was able to view it. That of course is speculation.
http://www.dishnetwork.com/SupportSection/blackouts
Game Finder Tools
Interesting things there.