Washington wasn't at its best in the middle period, but it was still able to extend its lead. Occupying Ovechkin's office at the left dot, John Carlson pounded a one-timer past Fleury after a boss retrieval from Oshie and a cross-ice pass from Kuznetsov.
The Golden Knights made things interesting when they scored the next two goals of the game in the third period, Neal scoring on the power play at 5:43 and Reilly Smith making a nifty move and a backhand finish to pull Vegas to within 4-2 with plenty of time - more than seven minutes - still remaining.
But Vegas' collective frustrations came to the fore at various junctures of Monday's game, and the aftermath of Smith's goal was one of those junctures. Suddenly placed on a line with Haula and Smith, Ryan Reaves went out for the shift after Smith's goal seemingly with the intention of stirring the pot. Reaves hit Wilson in neutral ice and the two jostled a bit, and both were boxed for matching roughing minors just over half a minute after Smith scored.
Four-on-four hockey has been problematic at times for the Caps in these playoffs, but not in this series. Washington blueliner Michal Kempny made a great play to set up Lars Eller for a big four-on-four goal in Game 2 in Vegas, and in Monday's Game 4, Kempny lighted the lamp himself.