The Caps' third line manufactured the goal. Alex Chiasson won the puck on the left wing wall high in the Pittsburgh zone, the issued the first of three short, quick, sharp tape-to-tape passes, bumping the puck to Brett Connolly. Connolly went to Lars Eller, and Eller fed Djoos on the weak side. The rookie blueliner cranked a one-timer that caught a piece of Matt Murray's glove, beating the Pens goalie on the short side at 19:07.
But Chiasson took a holding penalty with 4.5 seconds left in the second, giving the Pens' power play nearly two full minutes on a clean sheet of ice to start the third. This time, the Pens didn't wait. Justin Schultz made a strong play to feed Conor Sheary for a back-door tap-in just 38 seconds into the third, restoring Pittsburgh's two-goal lead.
Washington once again pulled to within a goal in the back half of the final frame, making it a 3-2 game when Alex Ovechkin was able to convert a neat Djoos feed from in tight. That goal came at 12:51, but unfortunately it was also the Capitals' final shot on net of the night.
The Pens locked down the one-goal lead skillfully from that point on, and Washington's best chance came late when Evgeny Kuznetsov went end to end, carving his way through the middle of the ice and into the Pittsburgh zone, only to be upended by Letang just before he could pull the trigger or make a move.