Dylan Gambrell appeared to give San Jose a 3-0 lead at 6:58 of the third period. McLellan challenged for offside, and the goal was overturned after video review showed Gambrell entered the zone ahead of the puck at 6:48.
Balcers scored into an empty net at 19:33 for the 3-0 final, with Burns getting his milestone assist.
The Kings are 0-3-0 in their past three games against the Sharks after going 1-0-1 in the first two games this season.
McLellan said a lack of execution on the power play is one reason for the recent lack of success. Los Angeles was 4-for-10 in the first two games and is 0-for-9 since, including 0-for-2 on Friday.
"When you play teams eight, potentially 12 times in one season in five months, you're going to get a pretty good idea of what they're doing," McLellan said. "It's going to get tougher to score power-play goals down the stretch simply because of that."
NOTES: Burns is the third active defenseman with 500 NHL assists (Duncan Keith, 520; Ryan Suter, 509). He is the 30th defenseman in NHL history with 500 assists and the 19th with at least 200 goals, 500 assists and 700 points. He has scored 715 points (215 goals, 500 assists) in 1,149 games in 17 seasons with the Sharks and Minnesota Wild. … It was the first three-point game and second multipoint game in the NHL for Balcers. … Jones, who played his first two NHL seasons with the Kings (2013-15), is 17-5-3 against them. … San Jose was 0-for-3 on the power play. Los Angeles has killed 28-of-29 penalties (96.6 percent) in its past 12 games.