Coming off The Redskins' home win over the Cardinals, they traveled to Gillette Stadium for a Week 8 inter-conference duel with the undefeated New England Patriots. In the first quarter, Washington trailed early as New England Patriots quarterback Tom Brady got a 3-yard touchdown run for the only score of the period. In the second quarter, the Redskins continued to fall behind as Brady completed a 2-yard touchdown pass to linebacker Mike Vrabel, kicker Stephen Gostkowski nailed a 36-yard field goal, and Brady pulled a "Marino"&#8212;by doing a fake spike and then completing a 6-yard touchdown pass to wide receiver Randy Moss. In the third quarter, Washington's deficit increased when Brady got a 2-yard touchdown run, along with linebacker Rosevelt Colvin returning a fumble 11 yards for a touchdown. In the fourth quarter, the Patriots finished their job with Brady completing a 2-yard touchdown pass to wide receiver Wes Welker, along with back-up quarterback Matt Cassel getting a 15-yard touchdown run. Afterwards, the Redskins got their only score of the game when quarterback Jason Campbell completed a 15-yard touchdown pass to tight end Chris Cooley. With the loss, not only did the Redskins fall to 4-3, but the Redskins allowed the most points in a single game since 1961 (53 points to the New York Giants).
Question: Which backup quarterback ran for a touchdown?
Answer: Matt Cassel