Janmark gave the Golden Knights the 3-2 lead at 13:53. Vegas defenseman Nicolas Hague shattered his stick on a shot from the left circle and the puck went to Janmark, who tucked it in with the backhand in front.
The Blue Jackets challenged for offside. According to the NHL Situation Room, the play prior to the goal was ruled offside, but the linesman did not whistle the play dead. The officials could not review that play, but only the latest entry from the Golden Knights, where Janmark was ruled onside.
"It's offside, but as soon as that puck exits, it's a whole new play," Blue Jackets coach Brad Larsen said. "I was frustrated, I couldn't help myself. I know the rule. I messed it up. That's where emotion gets the best of you, and that's on me."
The Golden Knights had their third multigoal comeback win of the season, the most in the NHL.
"We're finding ways to win games," DeBoer said. "I can't wait until we're healthy and we can roll a full lineup out there. It's going to be on those guys coming in to jump in and continue with the foundation we're on right now."
NOTES: Smith scored his eighth shorthanded goal with Vegas, surpassing William Karlsson (seven) for the most in the team's history. … Werenski became the first defenseman from the 2015 NHL Draft class to reach 200 points and the second in Blue Jackets history to reach that mark (Seth Jones in 338 games). He also extended his point streak to four games (two goals, four assists) in his 350th NHL game. … The Blue Jackets won four of the previous five meetings against the Golden Knights.