Trevor Moore scored a shorthanded goal 52 seconds into the third for a 2-1 lead. The Coyotes used a coach's challenge for goalie interference but the call on the ice was upheld and they were assessed a delay of game penalty.
"We faced a young, hungry team the last couple of days and it could've gone either way," Brassard said. "The third period there, we've got to be a little sharper."
Arizona forward Conor Garland drew two penalties in the final 1:48 of the second period, but the Coyotes weren't able to score and allowed a shorthanded goal.
"We started (the third) on the power play, but we were kind of lollygagging and kind of looked a little sleepy," Coyotes defenseman Jordan Oesterle said. "We didn't come out and try to finish them then and there and get one early."
Iafallo scored his second of the game into an empty net at 19:47 for the 4-2 final.
"I think it was a good learning night for us to be in that type of game from minute one all the way through, and hopefully we'll be better for it down the road," McLellan said.
NOTES: Iafallo has scored seven points (three goals, four assists) in his past six games. … Kopitar has nine points (three goals, six assists) during a seven-game point streak. … The Kings were 0-4-1 in the five games prior to the winning streak. … Los Angeles forward Andreas Athanasiou had one shot on goal in 11:47 of ice time in his first game since Jan. 26 (COVID-19 protocol). … Arizona forward Drake Caggiula played 10:34 after missing five games with a lower-body injury. … The Kings won four straight games for the first time since a seven-game streak to end last season.