JJ Peterka, Mikhail Sergachev, and Dylan Guenther scored for the Mammoth (18-19-3), who have lost three of their last four. Vanecek made 22 saves.
“A tough, tough result. Frustrating,” Utah coach Andre Tourigny said. “We played really well for the long stretch of the game at five-on-five, on our power play, even on our PK. Five-on-five, I think we did a really good job defensively, but we need to find a way in key situations and key moments and when push comes to shove, to be better.”
Peterka gave the Mammoth a 1-0 lead on the power play at 5:48 of the first period when he finished a cross-slot pass from Guenther in tight.
Josi tied it 1-1 at 9:51 with a wrist shot from the right face-off circle that beat Vanecek through traffic.
Sergachev put Utah back in front 2-1 at 3:41 of the second period. Nick Schmaltz fed a pass to Sergachev at the blue line, where he one-timed the puck over the glove of Saros.
“Obviously, I thought we played better for most of the game,” Sergachev said. “We were sloppy on the PK, and the last goal there cost us the game I think. We’ve got to be more focused in those crucial moments in the game."
Evangelista evened it 2-2 at 7:51 when he chipped a rebound off a Tyson Jost shot under Vanecek's blocker as he drove to the net.