Pinto put Ottawa ahead 3-2 at 4:24 of the second period, taking a pass off the rush from Drake Batherson near the top of the circles, chipping it past Tyler Myers and going backhand to forehand and between Lankinen’s pads in alone.
Pinto has five goals in his past five games after not scoring the previous 19.
“You put pressure on yourself,” Pinto said. “I'm a competitive person, I want to contribute for my team so just to produce for my team is pretty awesome and hopefully keep it going.”
Vancouver tied it 3-3 at 13:36 when Merilainen stopped Hughes' one-timer from the point only to have it bounce in off Jake DeBrusk’s skate atop the crease.
Josh Norris scored short-handed at 15:30 to put Ottawa back ahead 4-3, winning a race up the ice and converting a backdoor pass from Giroux.
“Obviously the key was a short-handed goal,” Tocchet said. “It can’t happen. These are key moments. It’s an egregious play. It’s a two-goal swing. It’s a key moment for them, not a key moment for us.”
Boeser tied it 4-4 at 15:10 of the third period after passing the puck to Pius Suter in the slot from behind the net, then converting a rebound of Suter’s shot from the side of the crease.
After not being busy early, Merilainen saved 10 of 11 in the third period.
“Felt really good,” Merilainen said. “Felt like I was on it from the start, and it's not a lot of shots, so made a little difficult, but felt good overall.”
NOTES: Amadio left at 5:06 of third period and did not return. Coach Travis Green said it was concussion protocol but did not have an update and said he would “talk to the trainers when we get on the plane.” Ottawa plays at the Edmonton Oilers on Sunday. … It was the second straight overtime win for the Senators, who have five this season, behind only the Oilers (7) and Boston Bruins (6). … Hughes tied Markus Naslund (74) for the fifth-most multi-assist games in team history. He has 17 points (three goals, 14 assists) in his last 12 games.