Despite sitting in the penalty box for six minutes, Domi played 14:49, took three shots on goal, delivered two hits and won four of nine face-offs.
"It was a little bit different, but it was a lot of fun," Domi said of playing center. "Playing with two wingers like that you just distribute the puck and follow them up the ice."
One of Domi's three penalties was for roughing. He served it early in the first period for jumping Pittsburgh's Chad Ruhwedel after Ruhwedel checked Keller into the boards from behind.
• Antti Raanta took the loss, Arizona's sixth in row, very hard. After the game, he spoke to reporters while seated in his stall - he usually stands - and still wearing most of his gear.
"We put our heart into the game today," said Raanta, who accidentally deflected Maatta's game-deciding shot into the net with his goalie stick. "Everybody was working extremely hard. There was moments where we were probably 10 minutes in our own end, but we were just battling. There was sacrifices today … When you make that kind of mistake it's tough because you kind of let your whole team down. It's a rough one for sure. I think it was probably going wide. Reactions took part there. That's pretty unlucky, but you need to learn from your mistakes and hopefully that will never happen again."