The Washington Capitals and the Las Vegas Golden Knights have made it to 2017-18 Stanley Cup finals. Neither team has won a Stanley cup final game before. Of all the NHL players in the 2018 Finals game 1, how many have won at least one game in a Stanley Cup Final game before?
Both Orpik and Fleury also played in 2008, where Penguins lost to Detroit Red Wings.
This should be all players with previous Stanley Cup final appearances from the rosters of the the two finalists according to sources below and also according to the Wikipedia article 2018 Stanley Cup Finals. (Here is link to the current revision. Notice the column "Finals appearance" in the section Team rosters.)