Greig scored his second goal of the period to make it 3-2 at 7:21 when he took a centering pass from Tkachuk, skated into the slot and beat Annunen with a wrist shot blocker side.
“I think my game’s coming along, slowly,” Greig said. “My offensive game and instincts are building and I’m just learning every day.”
Sanderson made it 4-2 at 11:04 when he drove to the net and finished a deke on the forehand in tight.
The Avalanche thought they’d scored when Sam Malinski beat Sogaard with a wrist shot from the top of the slot on the rush at 15:15. But the Senators challenged, and the goal was overturned when video review determined Jonathan Drouin was offside.
Rantanen took a cross-ice pass from MacKinnon on the rush and scored with a snap shot top right from just inside the left face-off dot to cut it to 4-3 at 16:18.
Miles Wood beat Vladimir Tarasenko wide, cut to the middle and chipped the puck over Sogaard’s blocker to tie it 4-4 at 4:04 of the third period. Wood, who also had an assist, missed the previous five games because of an illness.
“I think we just need a better effort from some people,” Martin said. “We need more determination. Like, I look at the fourth goal and it’s a lack of determination and a lack of commitment. To me, when you’re ahead and you’re protecting the lead, you need to have some urgency in your game.”
Malinski put Colorado in front 5-4 at 8:14 with a wrist shot from the point that beat Sogaard clean on the power play.
“Huge goal, right?” Bednar asked rhetorically. “The top power play unit was up and down the ice a little bit, [the second unit] gets out, they hadn’t been seeing a bunch of time, but they’d been working hard in practice, they move it around nicely for a chance or two and then Sam finds the back of the net. That was a huge goal. Good perseverance by Sam getting the one called back by about an inch at the [blue] line.”