Center Evgeny Kuznetsov left Game 2 in the first period, after a questionable hit from Golden Knights' defenseman Brayden McNabb.
The attendance number is the best of the team's three watch parties at the arena - with seats, again, filled in the 400 level.
Game 3 is at Capital One Arena on Saturday (8 p.m. ET; NBCSN, CBC, SN, TVAS).
Washington is 9-3 on the road during the playoffs, but 4-5 at home.
Vegas right winger Alex Tuch said the Knights will try to push back and be "just as physical, if not more physical" than the Capitals, but most importantly they will try to come out with a lot of energy and attempt to take away the pace from Washington at home.
The Vegas Golden Knights lit the lamp first, scoring midway through the opening period of Game 2 just as they did in the Stanley Cup Final opener. Some teams could survive losing one of their best players, but the Capitals didn't seem like one of those teams.
Golden Knights win Game 1 of Stanley Cup Finals
None of the remaining six Stanley Cup Final games is scheduled to go head to head with the National Basketball Association . Nicklas Backstrom , with a goal and an assist, Brett Connolly , John Carlson and Tom Wilson replied for the Capitals.
It was 98 degrees at game time in Las Vegas.
Over his National Hockey League career, Holtby has a 2.04 GAA and.929 save percentage in the Stanley Cup playoffs. "It is always loud and look forward to playing the game".
Vegas is 13-4 in the post-season, but was tied 1-1 through the first two games against both the San Jose Sharks and Winnipeg Jets after sweeping the Los Angeles Kings in the opening round. Washington fell behind in each of the first three rounds and rallied to win.
Vegas got a 5-on-3 power play for 1:09 when Tom Wilson took an interference penalty and Eller was whistled for hooking early in the third, but Holtby, who allowed five goals on 33 shots in Game 1 after posting back-to-back shutouts to close out the Tampa Bay Lightning in the Eastern Conference final, managed to hold the fort. "The Knights, in my mind, really put the exclamation point that we're the sports capital of the world, not only what they've done on the ice in this historic season but how they brought the community together". Many planned to simply soak up the atmosphere while watching the game on big screens outside the arena with thousands of new friends.
The Strip has hosted countless events over the years, featuring stars on stage and in the ring.
The Golden Knights were threatening the Capitals' goal when the exchange occurred. (Wednesday) night they didn't have the offensive outburst they usually have. Reaves stood in front of the goal while surrounded by several Capitals defenders.