Despite the loss, Kassian took positives from the game.
"Tonight we really gained a lot of confidence, especially against a good team like that," Kassian said. "We played the right way and I think people started to see that if we play the right way, we can play anyone."
Quick kept the Kings in the game early with notable point blank second-period saves on Connor McDavid, on a backhand attempt and another while seated. Quick won his 31st game and has a goals-against average of 0.99 and a .964 save percentage during the three-game win streak.
Edmonton outshot Los Angeles 7-0 to start the game but was outshot 11-4 in the final 12 minutes of the first period.
"We weren't very good in the first [period]," Kings defenseman Jake Muzzin said. "We got it going in the second and we just had to connect the defense with the forwards … these are games that you want to win now, so when it comes to playoff time you know how to do it. It's crucial for us to continue winning these."
The Oilers, who play at Anaheim on Friday, scratched right wing Teddy Purcell and defenseman Justin Schultz.
McLellan said the scratches were "later afternoon decisions."
"What's gone on and transpired since that point till now, I'm not aware," McLellan said. "But if they're available to us and they're ready to play, then we'll considering using them to play [in Anaheim]."
The Kings host the Buffalo Sabres on Saturday.