Four completed passes to the other team was enough for coach Shanahan.
Redskins quarterback Rex Grossman was picked off twice by Eagles safety Kurt Coleman on back-to-back drives to end the third quarter.
The erratic play led to a switch under center, as the team turned to John Beck to start the final quarter.
Beck led the offense en route to a ten-play, 80-yard touchdown drive – scoring on a two-yard run to close the gap to 20-13.
In his two drives, the ’08 second-round pick from BYU went 8 out of 15 for 117 passing yards.