Dylan Genser defeated his powerplay tie at 7:03 in the third season, defeating the Utah Hockey Club on Wednesday night.
Guenther defeated goalkeeper Ville Husso on a feed from defensive man Mikhail Sergachev. Guenther has a career-high 24 goals this season.
Jack McBane and Alexander Carfoot scored to help Utah move within two points of the second wildcard in the Western Conference. Karel Vejmelka saved 19.
Alex Killon and Mason McTavish scored for the duck, while Fuso stopped 36 shots.
McBane scored with 8:57 left in the first period. Kerfoot went second at 5:29, 2-0, knocking Husso out of close range with a quick shot. Killon regained one for Anaheim after 1:02, and Mactavish tied it with a third 3:22 power play.
Take home
duck: Anaheim had finished a 7-4 home loss to Washington on Tuesday night.
Yuta: Utah fell 4-3, 4-3, 4-3 on Friday night in Chicago and 4-3, 4-3 in a shootout against Toronto on Monday night.
Important moments
After Anaheim gathered, Gunter brought Utah back to the top.
Key Statistics
Utah outperforms duck 39-21.
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Both teams will play on Friday night. The Ducks will host Nashville, while Utah will open a three-game trip in Seattle.