It was the seventh goal and 15th point of the season for Sennecke, tying him for the NHL rookie lead in both categories.
"He's dangerous," Ducks coach Joel Quenneville said of Sennecke. "He's dangerous with the puck, he's dangerous off the rush, his play recognition. ... I think there are other parts of his game, when he's coming up with loose pucks, or he's influencing pucks, he's starting to do more of that."
McTavish gave Anaheim a 2-1 lead at 14:34, finishing a feed from Chris Kreider on a 2-on-1 break.
Pinto’s power-play goal tied it 2-2 with 58 seconds remaining in the period. He scored from in close with six seconds left on the man-advantage after Mrazek missed a poke check.
"We stall ourselves with penalties that are untimely," Quenneville said. "We've got to get that out of our game."
Stephen Halliday, playing in his first NHL game, earned the primary assist on the goal.
"Obviously, a really skilled, high-hockey IQ player," Batherson said of Halliday. "He makes that play through the seam, saucer pass right on the tape. Impressive stuff."