Brian Dumoulin tied it 1-1 at 15:14 with a wrist shot from the top of the left circle that went glove side through a screen by Alex Turcotte.
Kelly put Colorado back in front 2-1 at 17:58. He recovered a clearing attempt up the boards from Josh Manson, skated in on a 2-on-1 with Fedor Svechkov, and buried a wrist shot from the right circle three seconds after a power play expired for the Kings.
MacKinnon extended the lead to 3-1 with a power-play goal 23 seconds into the second period. He one-timed Kadri’s cross-slot pass short side from the left circle while on a 5-on-3.
“Obviously, the other unit really carried it tonight. Our unit's got to get on the same page a little bit,” MacKinnon said. “I think guys are a little stuck kind of positionally, but luckily we have really good players on this team and they picked us up tonight. So, really fortunate for that.”
On the ensuing 5-on-4 power play, Armia was able to cut the lead to 3-2 with a short-handed goal at 1:28. He skated into the high slot and beat Blackwood under his glove with a wrist shot.
“I think that's a really tough one to assess. I think we took a little step back from maybe the last preseason game,” Kings forward Erik Haula said. “I think we took a step forward offensively. It's just, against that team and when you take that many penalties and make mistakes like that, they can really make you pay. And they sure did today. But offensively, on the road when you score four goals, you like your chances most nights.”