Capitals defensemen Matt Niskanen and Dmitry Orlov each were credited with an assist after a series of passes gave Ovechkin a prime scoring chance. The winger entered the zone along the boards and protected the puck from a diving Hurricanes defender.
After readjusting the puck from the defender's attempted poke check, Ovechkin flicked a quick wrist shot low to beat Mrazek. It was Ovechkin's fourth goal in the first-round series.
The goal gave the Capitals a 2-1 lead in the first period during Monday night's Game 6. Washington took the one-goal advantage into the first intermission, but the Hurricanes responded with four unanswered scores to force Game 7.
Teuvo Teravainen tied the game at 2-2 in the second period. Jordan Staal notched the go-ahead goal in the third, while Justin Williams and Dougie Hamilton clinched the 5-2 victory with scores in the final frame.
The Hurricanes and Capitals face off in the deciding final game of the series Wednesday night at Capital One Arena.