Capitals fans stand and cheer Monday night as their team takes the ice before Game 4 of the Stanley Cup finals. (John McDonnell/The Washington Post)

The Washington Capitals’ rout of the Vegas Golden Knights in Game 4 of the Stanley Cup finals Monday night was almost certainly the highest-rated game locally in franchise history.

The Caps’ 6-2 victory gave them a 3-1 lead in the best-of-seven series. It also drew a 22.9 local household market rating, drowning out Game 1’s previous record of 16.0, according to NBC Sports, and the 12.6 from Game 7 of the Eastern Conference finals before it. The only previous time Washington appeared in the Stanley Cup finals, in 1998, Game 1 on Fox garnered a 13.7 local household rating.

The Nationals’ best-ever local TV rating was a 16.7 for Game 5 of their playoff series against the St. Louis Cardinals in 2012. The Redskins often receive local ratings above 20, but for another Washington team to hit that mark is likely unprecedented.

In Las Vegas, the game drew a 20.5 household rating, which still trails Game 1’s record of 28.1.

Nationwide, its 3.94 overnight household rating dwarfed Game 1’s mark of 3.72, which was the best viewership for the start of the Stanley Cup finals since 2015.

Washington, Las Vegas, Baltimore (12.39) and Richmond (10.54) drew the largest audiences in ratings.

Read more Caps coverage:

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90-year-old ‘best hockey fan ever’ watched Caps-Knights Game 4 from owner’s box

The Capitals picked them up for cheap. Now they’re valuable pieces of a Stanley Cup run.