Semin got help on his milestone goal as his shot from the right-wing boards hit the helmet of Islanders defenseman Travis Hamonic and caromed off the post past goalie Rick DiPietro at 5:33 of the third period.
The Kings' Justin Williams, who rang a shot off the post in the game's opening moments, tied it early in the second period, weaving his way from the mid-ice right-wing boards into the Devils' zone and beating Brodeur from the slot for his fourth goal of this postseason.