Jonathan Quick made 22 saves as host Los Angeles routed New Jersey to move within a game of securing its first-ever Stanley Cup title.
Alec Martinez, Anze Kopitar, Jeff Carter and Justin Williams scored for Los Angeles, which can complete a championship sweep with a win in Game 4 at the Staples Center on Wednesday night.
Already up 2-0 following a dominant 40 minutes, the Kings put the game away on a Carter power-play goal 4:15 into the third. After defenseman Willie Mitchell gloved a New Jersey clearing attempt at the blue line to keep the play onside, the puck eventually made its way to Carter, who redirected the puck from the bottom of the right circle over the blocker of New Jersey netminder Martin Brodeur.
Williams added some insurance at 6:47, banging home a rebound of his own shot with the Kings enjoying another man-advantage opportunity.
Quick took care of things from there, earning his third shutout of the postseason as the Kings became the first team in NHL history to take a 3-0 lead in all four rounds of the playoffs.
Brodeur turned aside 17 shots in defeat.
New Jersey had the best scoring chance during a conservative first period, but couldn't capitalize on a lengthy power play.
With Mike Richards already in the penalty box for elbowing, Carter picked up a double-minor for clipping Adam Henrique with a high stick. That gave the Devils a 5-on-3 advantage of more than a minute, but New Jersey couldn't convert and lost the remainder of its power play when Marek Zidlicky hauled down Richards just inside the Los Angeles zone.
The Kings finally broke through on a controversial play 5:40 into the second period. At the end of a scramble in front of the New Jersey net, Martinez jumped in and jammed the puck past Brodeur as it sat beneath his left pad.
Los Angeles extended the advantage on a sensational passing sequence at 15:07. Williams gathered a cross-seam pass and dropped the puck back to Dustin Brown, who found Kopitar for a one-timer that eluded Brodeur up high.
GAME NOTEBOOK: The Kings welcomed back F Simon Gagne, who hadn't played since suffering a concussion in a Dec. 26 game against the Phoenix Coyotes. Gagne went scoreless while registering three shots on goal in 6 1/2 minutes of play. ... Los Angeles has allowed just five third-period goals in 17 playoff games. ... NHL all-time scoring leader and former Kings great Wayne Gretzky conducted the ceremonial pre-game faceoff. Gretzky led Los Angeles to its only previous Stanley Cup appearance in 1993.