Cotter, a fourth-round pick (No. 115) by Vegas in the 2018 NHL Draft, played in his second NHL game. Rondbjerg was a third-round pick (No. 65) by the Golden Knights in the 2017 NHL Draft. Had a goal and an assist playing his seventh NHL game.
"Being in Vegas is a treat," Cotter said. "This arena is crazy. I think when you score that first one you kind of zone out and you're in a daze a little bit. You still hear the roar of the crowd when you're skating back to the bench. It's a feeling you can't describe."
Jonathan Marchessault scored for the fifth time in five games, and Laurent Brossoit made 24 saves for the Golden Knights (8-6-0), who have won seven of nine.
"When you get a call-up like this I think you need to take advantage of it, and I think those two guys did," Marchessault said. "From the moment they showed up they've been playing good hockey everywhere on the ice. It's fun for them to get rewarded."
Jared Spurgeon and Ryan Hartman scored, and Cam Talbot made 32 saves for the Wild (9-4-0), who had their four-game winning streak end in the second game of a back to back. They defeated the Arizona Coyotes 5-2 on Wednesday.
"We didn't have a great start, looked a little sluggish," Wild forward Marcus Foligno said. "Just didn't get to our game early."
Cotter gave the Golden Knights a 1-0 lead at 6:08 of the first period on a wrist shot from the right circle.
"That's my default move," Cotter said, starting with a stutter step and going backhand to forehand for the finish. "I've done it a few times in my career, so I was comfortable doing that."