"It is scary to see that, especially as a goalie [because] you're not really expecting it because you have the full cage on," Capitals backup goalie Pheonix Copley said.
Holtby allowed one goal on 11 shots. Copley made 10 saves in relief for Washington (27-12-5), which had won three straight.
"We're testing him with a lot of stuff this year and he's again passed with flying colors," Reirden said. "Another example today, he comes right into the game and we give up some chances, and quality ones, and he's solid. That was great."
Capitals forward Alex Ovechkin went to the dressing room late in the first period to get stitches for a cut on his hand but returned for the second.
Atkinson made it 1-0 at 1:00 of the first period after taking a stretch pass from Markus Nutivaara behind the Capitals defense.
"I could see the whole play develop and I was just hoping," Atkinson said. "I was calling for it, but I was hoping, especially when [Nutivaara] picked his head up, that he would see me, and he made a great play and it was a nice goal."