"I think we shot ourselves in the foot in the first and part of the second," head coach Dallas Eakins said. "I think in the third what happened wasn't that we got our game going, we quit turning pucks over in the neutral zone. It's as simple as that. We weren't turning pucks over, we got O-zone time, we got lots of looks at the net. In the first period, I think we turned it over nine, maybe 10 times. It cost us valuable O-zone time. Second period, same thing. That was the difference for me."
With the loss, Anaheim fell to 26-22-9 (61 points) on the season, sixth in the Pacific Divison (.535), and 2-3-0 heading to the finale of a season-long six-game homestand.
John Gibson made 29 saves in his 40th start of the season. Jakob Silfvebrerg, Nicolas Deslauriers, Trevor Zegras and Troy Terry scored for Anaheim.
Anaheim's power play continued its excellent season, scoring twice on the man advantage for the second straight game. The Ducks now rank fourth in the NHL on the power play (41-for-155, 25.9%) and eighth on the penalty kill (133-for-161, 82.6%).
Nicolas Roy (twice), Ben Hutton, Jonathan Marchessault and Michael Amadio scored for the victorious Golden Knights, who moved into the Pacific Division's third and final playoff spot with the win.
Silfverberg gave Anaheim an early lead thanks to some friendly home-cooking. The veteran winger got to a loose puck in the Vegas zone and skated down the wall before zipping a low shot along the ice, off the stick of unsuspecting Vegas netminder Laurent Brossoit and between his legs, putting the Ducks ahead 1-0 just under five minutes into the action.