Hyman scored on the power play on a three-way passing play with McDavid and Leon Draisaitl at 17:12 of the second period to make it 2-0.
"Obviously, this power play has been together for a long time and they have great chemistry, so I'm just trying to fit in and try to find lanes," said Hyman, who signed a seven-year contract July 28 after six seasons with the Toronto Maple Leafs. "We practice it a lot, the backside; obviously all those guys, Leon, Connor and [Ryan Nugent-Hopkins] can all make those backdoor passes, so you have to be able to find a lane for those guys, and whether they shoot it past the goalie or find me, it was good to get the first one."
Ekman-Larsson scored on the power play on a shot through traffic at 12:28 of the third period to make it 2-1.
"We did a lot of good things in that game," said Ekman-Larsson, a defenseman who was acquired along with forward Conor Garland in a trade with the Arizona Coyotes on July 23. "Being down 2-0 going into the third and battling back, I thought we did a lot of good things."
Quinn Hughes scored at 17:11 on a shot from the left boards that beat Smith on the short side to tie it 2-2.
"I think [Elias Pettersson] was driving to the net and it was a good screen, and I had a guy on my hip too and wanted to get rid of it soon," Hughes said. "I know if I got something to the net, I didn't know if it would go in or not, but I knew it would surprise him, and I was lucky that I think he was cheating and wasn't on his post.
"It's always important to get off to a good start, and last year we didn't get off to a good start, and it's always tough when you're struggling, so to get a point in our first game, it's encouraging."