With the momentum of a late-game victory against Houston and the return of Willis McGahee, who had missed the previous three weeks with rib injuries, the Bills took an early lead and held off the Jaguars at the end. After Jacksonville scored with 0:34 remaining and after a questionable squib kick, J. P. Losman threw a pass down the sideline to Roscoe Parrish who kept his toes in just enough to set up a game-winning Rian Lindell 42-yard FG as time expired. Parrish had earlier made the game's biggest play of the game when he had an 81-yard punt return in the third quarter. With their second straight victory, the Bills improved to5-6.

Based on the above article, answer a question. How many yards was the biggest play of the game?
81