It's safe to say that in the 4th game, he played the time of a 4th line player. It's quite alarming for a man who has spent his life on the first line, even at 38 years old.
The legend had nothing left in the tank
The reason for the captain of the Caps' poor performance is quite simple: he had nothing left in the tank. Limited to no points and 6 shots on goal, Ovy was completely exhausted.
We can understand. No one saw the Capitals qualifying, yet they did, thanks in part to their captain's performances. Unfortunately for them, the lack of depth got the better of almost everyone.
Recall that the Caps were sellers at the trade deadline. The plan wasn't to make the playoffs, even internally. Everyone had to give more, especially after the departures of Anthony Mantha and Evgeny Kuznetsov.
Regardless of what happens next for Ovy, it's a one-way ticket to the Hockey Hall of Fame upon retirement, as well as most likely the all-time record for goals scored in the regular season.