BUFFALO, N.Y. — The Pittsburgh Penguins are a far better team when play-making defenseman Kris Letang keeps his emotions in check.

A day after losing his cool in a 4-2 loss against Tampa Bay, Letang showed patience in overcoming the Sabres’ aggressive forecheck by setting up three goals in a 4-3 win at Buffalo on Sunday.

“He’s such a good player when he plays the game the right way and when he has control over his emotions,” coach Mike Sullivan said.

“He’s a competitive guy. He really cares. That’s why he’s emotional. But obviously, he’s got to channel it the right way. And I though he did that.”

Letang poked holes in the Sabres defense in helping the Penguins build a 4-1 lead and beat Buffalo for the eighth straight time.

He set up Scott Wilson’s go-ahead goal with a pass that found the rookie forward wide open to the right of the net early in the second period. Letang’s no-look pass from the right point set up Phil Kessel to make it 3-1.

And before it was over, Letang had a hand in Matt Cullen’s short-handed breakaway goal midway through the third period.

Letang bounced back from a loss to Tampa Bay in which he was penalized three times, including an unsportsmanlike conduct penalty for playing with Lightning forward Cedric Paquette’s stick.

“It was good to respond to that and have a good game, especially after yesterday,” Letang said.

Patric Hornqvist also scored in a game the Penguins never trailed. Marc-Andre Fleury stopped 24 shots.

Pittsburgh improved to 9-3-1 in its past 13, and moved three points ahead of ninth-place New Jersey in the Eastern Conference.

The Sabres had a 3-0-1 streak snapped and received even more bad news following the game. Coach Dan Byslma announced that top-line center Ryan O’Reilly will miss three to four weeks with a lower body injury.