Williams, 35, and defenseman Brooks Orpik, 36, are the two oldest Capitals (also the only ones to win a Stanley Cup) and usually among the last players to take the ice. What are they doing in the locker room?
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"We listen to our '90s rock in here and we enjoy it, the two of us," Orpik said, "and then get out there. Everybody's got their different routines."
Williams, a three-time Stanley Cup winner, is 7-0 in Game 7 with an NHL-record 14 points, including a League record-tying seven goals (with Glenn Anderson). So his routine leading into this one was of great interest.
This game is the main reason the Capitals signed him as an unrestricted free agent on July 1, 2015.
"You've just got to enjoy why you're here," Williams said. "This is not the apex, but this is pretty close. This is the stuff that you're thinking of when you're a kid. This is Game 7. This is do or die. This is win or go home. This is everyone's watching, let's see what you've got. … We'll be ready."
The Capitals are 4-10 in Game 7, including 3-7 at home. The Penguins are 8-7 in Game 7 but are 5-0 on the road. That includes Game 7 wins at Washington in 1992 and 2009.
How much any of that will mean Wednesday is debatable. In this best-of-7 series, the Capitals trailed the Penguins 3-1 before winning the past two games. They are one victory from reaching the Eastern Conference Final for the first time since 1998.
"The approach is our backs have been against the wall for two games and now theirs are too," Williams said. "It's going to be a fight of will, and I can tell you one thing: I'm going to give everything I have tonight and make sure I don't let my teammates down, and everyone in this room is going to do the same and we'll be fine."