The Capitals scored all three goals in the second period, with Jakob Chychrun adding his 22nd of the season. Braeden Bowman and Tomas Hertl scored in the third for Vegas, but Washington's defense held on for the win.
Washington moved within two points of the New York Islanders for third place in the Metropolitan Division and within two of Boston for the Eastern Conference's second wild card. The Capitals improved to 2-0 since the Olympic break and have won six of their last seven games.