“Back in the ’90s, NU was a wrestling powerhouse, and I want to bring it back,” said first-year head coach Gary Sumner. “People know who NU is. You go to the Bay Area or down south, they’ve heard of us. I want other schools to be scared to face NU.” The Miners are off to a good start after opening the season last weekend, placing second out of 20 teams at the Vista Eagle Varsity Invitational hosted by Vista Del Lago. At the tourney, NU had four wrestlers finish first in their respective weight classes. Sumner knows what it takes …