He has told the players to fine tune their game, rule out errors and deliver a top draw performance against the Eagles to go home with a 100 per cent record of wins.
McBryde said: "Everybody should be giving their all to impress the coaches on Saturday because it is their last chance to do so. It has been a long season but it is not too much to ask for them to get things right because that is in their hands."
He praised his squad for making selection tough on his coaching team because of the way players have developed on tour.
He said:"We are simply aiming to step up our level of performance. The USA will be tough opposition just like Canada were. They will be there for 80 minutes and they'll fight to the death. The USA will be very physical and we are going to have to match that."
Wales skipper Ryan Jones added his team was ready to give their all to achieve a victory to end the tour.
He said: "The balance in the team is very good and we are playing for our country and there is no greater motivation to do well than that. Whatever is left in the tank the boys will empty it on Saturday.
"We are expecting a big challenge on the weekend and it is going to be down to us to front up to that. The breakdown area is going to be key as it is now becoming every time we play. Basically we can't afford to make mistakes."
The game against the USA on Saturday is the final test of the two match tour. Wales beat Canada by 32 points to 23 last weekend in the first game.