I don't know if it's so much the defensemen as it is team defense in general. SCSU's top three lines are extremely balanced, so there's few options for opponents expecting their top two forward lines to score while hoping their bottom two lines just survive. The same goes for the third defensive pairing. Mismatches are going to happen. SCSU has an NCAA leading 13 players averaging 0.50 ppg or better.
That being said, the Gophers have talent up and down their roster, they just need to put it together. Otherwise, potential exists for a guy like Lettieri, C. Reilly, or Cammarata to get worked pretty hard. Those guys have top end skill, but they're typically not going to back check like the game hinges on their performance away from the puck (which it kind of does). If they can get motivated, no reason they can't compete player for player and line for line.