Markstrom signed a two-year, $12 million contract extension on Friday. It has an average annual value of $6 million and begins with the 2026-27 season.
Dawson Mercer scored two short-handed goals, and Nico Hischier and Brian Halonen each had a goal for the Devils (9-3-0), who ended a two-game losing skid.
Andrei Kuzmenko had a goal, and Darcy Kuemper made 18 saves for the Kings (5-4-4), who ended a seven-game point streak (4-0-3). They have yet to win on home ice this season (0-3-2).
The Devils took a 1-0 lead 1:22 into the first period when Hischier redirected a point shot from Luke Hughes. The assist was Hughes’ 100th NHL point.
Jeff Malott nearly tied it up at 5:20 but his sharp-angle shot went through the open crease, and Dennis Cholowski was able to tie up Corey Perry at the right post to prevent him from tapping the puck into an empty net.
Halonen made it 2-0 at 3:12 of the second period when he beat Kuemper glove side with a sharp-angle shot off the rush. It was his first NHL goal.
Mercer scored short-handed with a wrist shot from the left circle on a 2-on-1 rush to put New Jersey ahead 3-0 at 3:09 of the third period.
Kuzmenko cut the lead to 3-1 at 9:49 with a chip shot from the low slot off Anze Kopitar’s centering pass from the corner.
Mercer made it 4-1 at 16:12 with an empty-net goal while Kuemper was pulled for an extra attacker during a Kings power play. Markstrom had the primary assist.