Jonas Brodin and Jake Middleton also scored for the Wild (43-21-12), who have won three of their past four games. They are third in the Central Division, four points behind the Dallas Stars with six games remaining. Dallas was hosting the Colorado Avalanche on Saturday.
“I think we know these last couple of games before we're heading into the playoffs, it's going to be important to shape the way we want to play but also be in the right tempo when we get to playoffs,” Wallstedt said. “I think, especially playing with a lot of confidence, that's big, and guys are helping me a lot.
“We had an unbelievable amount of blocked shots (13), and that always helps me, makes it a lot easier for me.”
Drake Batherson scored and Linus Ullmark made 19 saves for the Senators (39-27-10), who have lost four of five (1-3-1) and were unable to pad their lead for the second wild card in the Eastern Conference. They entered Saturday in a four-way points tie (88) with the Detroit Red Wings, Columbus Blue Jackets and Philadelphia Flyers but hold the first tiebreaker with 33 regulation wins.
The Red Wings lost 4-1 to the Minnesota Wild and the Senators lost 4-1 to the Minnesota Wild; the Blue Jackets are hosting the Winnipeg Jets later Saturday and the Flyers are idle.
“Obviously, it stings right now,” Ottawa forward Shane Pinto said. “But we’ve got to get ready, get our bodies ready to battle a little bit harder tomorrow (against the Carolina Hurricanes) and come out with a good effort.”