The Detroit Red Wings' woes at Joe Louis Arena continued Tuesday night.
"They didn't have a lot of good opportunities," Mazanec said. "Our defense played great."
The Red Wings hadn't lost eight in a row in Detroit since Nov. 19, 1986, through Dec. 20, 1986.
Mazanec, 22, was Nashville's sixth-round pick (No. 179) at the 2012 NHL Draft. He made his fifth NHL appearance Tuesday.
"He's catching up to the level," Predators coach Barry Trotz said of his goaltender. "He's confident after seeing some of the best players in the world. When you start facing those guys on a regular basis, you're going to feel a little bit more confident if you have success."
Shea Weber broke a scoreless tie via the power play with 4.8 seconds remaining in the second period. With Red Wings forward Drew Miller in the box for hooking, Weber took a pass from David Legwand and ripped a slap shot from the point past Jimmy Howard to give the Predators a 1-0 lead. It was Weber's sixth goal of the season.
"That was a huge goal," Trotz said. "We're in Detroit and they've got guys like [Pavel] Datsyuk and [Henrik] Zetterberg. They're dangerous."
Gabriel Bourque's goal at 7:13 of the third gave Nashville a 2-0 lead. With the teams at even strength, Viktor Stalberg intercepted Niklas Kronwall's clearing attempt at center ice, skated into the Detroit zone and fired a wrister from the slot that went wide and off the end boards. The puck bounced back in front, and Bourque swatted it past Howard for his fifth goal of the season.
Howard stopped 25 of 27 shots for Detroit.
"It's just a frustrating time for us right now," Howard said. "It doesn't seem like anything's going our way out there, but you've got to go out there and work for your breaks. I don't think it's lack of trying or lack of effort. I think we've just got to dig in a little bit harder around the net and not squeeze our sticks so tight."
Red Wings defenseman Danny DeKeyser left less than four minutes into the game after being hit into the boards by Predators forward Patric Hornqvist. The Red Wings announced during the first intermission that DeKeyser would not return. Coach Mike Babcock said afterwards that DeKeyser will be "out for a bit" and "definitely won't play this week."
Detroit general manager Ken Holland told the team's website that DeKeyser will have tests on Wednesday to determine the severity of the injury.
The 23-year-old entered Tuesday with two goals and seven assists in 21 games this season.
"You know he means a lot to this team," Kronwall said. "He's been one of our better players all season long. We'll see how he is and hopefully he'll be back soon."
Detroit will play at home again Thursday night against the Carolina Hurricanes.
Nashville, which has won back-to-back games after losing four straight, will visit the Toronto Maple Leafs on Thursday.
Material from wire services and team media was used in this report