Anderson was in the penalty box when Los Angeles pulled ahead courtesy of rookie winger Arthur Kaliyev's blast from the circle.
Kaliyev's first goal of the season at the 12:19 mark of the stanza was assisted by defenseman Kale Clague and Kopitar.
The Kings took a 2-1 lead into the break.
Los Angeles went ahead by a pair just 1:53 into the third period on the power play courtesy of youngster Rasmus Kupari, who beat Allen with a blistering shot upstairs.
Kupari's second goal of the season was assisted by defenseman Matt Roy and winger Alex Iafallo.
Speaking of Iafallo, he put the home team up 4-1 at the 5:37 mark of the frame.
It was his second goal of the year.
Roy was credited with the lone assist.
Then, Iafallo added the Kings' third tally with the man advantage with 5:44 left in regulation.
Phillip Danault and Kupari picked up the assists.
Defenseman Ben Chiarot capped the scoring with 2:20 left in regulation with his second goal of the season to make it 5-2.
Anderson and Nick Suzuki collected the assists.