I believe that competition rules require that a team have two goaltenders dressed for games. For both of the games so far this weekend, for the first time that I can remember, the Gophers have had only two goaltenders dressed.
The box score for yesterday's game at CollegeHockeyStats lists as a third G, 17-Sierra Smith (DNP). I assume this means that if Peters had been injured and unable to continue that Smith would have donned someone's goalie tools and sat on the bench to fulfill the requirement that a team have two dressed.
I wonder if she is any good.