Nicklas Backstrom won the left dot draw, and after an exchange on the blueline, Dmitry Orlov found Conor Sheary, whose one-timer from the right circle clicked off Devils defender Damon Severson and went in at 3:21 to put Washington on top, 2-1.
Less than five minutes later, the Caps extended their lead just 11 seconds into their first power play opportunity of the afternoon. After Oshie won a right dot draw and the Caps worked the puck to Backstrom at the half wall, he fired on net. Mackenzie Blackwood made the stop, but Ovechkin was there to bury the rebound at the back door, making it a 3-1 game at 8:09 of the second.
New Jersey carried the play in the back half of the second period, outshooting the Caps 9-1 after the Ovechkin goal and holding Washington without a shot on net for more than 10 minutes. The Devils drew to within a goal during a stretch of 4-on-4 play late in the stanza, making it 3-2 on a Yegor Sharangovich goal at 17:42.
Samsonov made one of his better stops of the contest soon after, denying Severson's back door bid to keep the Caps up by a goal entering the final frame.
Early in the third, the Devils had a chance to draw even when Lars Eller was sent to the box, Washington's third straight minor penalty in less than eight and a half minutes of playing time. Instead, the Caps extended their lead with a shorthanded strike.
Garnet Hathaway used the boards to chip a puck off the wall and around Severson at the Washington line, then won a foot race to the disc with the Devils defenseman. Hathaway then threaded a feed to the front for Carl Hagelin, who buried it for a 4-2 Caps lead at 2:41.
Less than three minutes later, the Caps' Russian troika combined to make it 5-2, Dmitry Orlov breaking it out and feeding Ovechkin, and the captain patiently waiting to feed Evgeny Kuznetsov for the finish in front at 5:31.
But the Devils didn't go away, closing the gap on a Jesper Bratt goal at 10:15 and closing to within one on Zajac's second of the game at 15:53, a virtual carbon copy of his first goal. Samsomov had to make only six saves in the third, and only one of those came after the second Zajac goal. The Caps were effective at denying time and space as New Jersey vied for a late equalizer.