Tyler Arnason set up a frenetic finish when he scored with 2:01 left, and the Avalanche had a power play for the final 1:17 after Mattias Norstrom was called for high sticking, but Colorado couldn’t tie it.
Avs goalie Jose Theodore, who was seeking his first four-game winning streak since Oct. 31 to Nov. 8, 2005, with Montreal, allowed four goals in the second period and was replaced by Peter Budaj with Colorado trailing 5-2.
Avery’s second goal came in the third period and proved to be the game-winner.
After Conroy’s goal put the Kings ahead 1-0, the Avs outshot the Kings 7-0 over the final 4:42 of the first period, and two of those went past Dan Cloutier to give Colorado a 2-1 advantage. Marek Svatos tied it 1-1 with 3:52 left when he scored on a power play with an assist from Joe Sakic, and 24 seconds later Wojtek Wolski scored off a give-and-go with Ossi Vaananen.
The momentum quickly shifted, however, when Lubomir Visnovsky tied it 2-2 just 2:20 into the second period, and then the Kings scored two goals a minute apart to take control.
Avery gave the Kings the lead with a short-handed goal off an assist from Alexander Frolov, his first of three assists. A minute later, Thornton received the puck from Michael Cammalleri and put it past Theodore for a 4-2 lead.
Frolov assisted on Anze Kopitar’s goal with two minutes left in the period that made it 5-2.
Brett McLean’s goal 90 seconds into the third cut Colorado’s deficit to 5-3, and Sakic scored at 12:08 to pull the Avalanche to 5-4. Sakic tied Ray Bourque (1,506 with Boston) for the fifth-most points for a single franchise in NHL history.
Just more than a minute later, however, Avery’s second goal made it 6-4.
Notes: Brown had a roughing penalty that sent John-Michael Liles to the dressing room in the second period. … Sakic needs one assist to tie Stan Mikita (926) for 15th place on the NHL’s career list. … Theodore saved 17 of 22 shots. In his previous three games, he stopped 97 of 103.