Protas scored a shorthanded goal Saturday in a 2-0 win over the Bruins.
Protas was credited with the game-winner in Saturday's preseason finale. He won a faceoff in the left circle, and the puck ricocheted off the linesman's skate into the low slot, where he jumped on it and lifted a shot over Brandon Bussi's glove. Protas projects to be a third-line winger in Washington, which would limit his fantasy upside.