Green Bay's 2010 off-season was mainly concentrated on improving their faulty offensive line. In the season opener, the Packers faced an Eagles team that was playing without quarterback Donovan McNabb for the first time in a decade. However, the offensive line failed to deliver again as Rodgers took three sacks in the first half and also threw an interception. Meanwhile, Philadelphia's new quarterback, Kevin Kolb, was pulled with a concussion and replaced by Michael Vick. After a while, the Packers' defense adjusted to him and Green Bay pulled off a 27–20 win, their first in Philadelphia since 1962. Second-year linebacker Clay Matthews (who knocked Kolb down) delivered an impressive performance in the game. After an easy win over Buffalo in Week 2, the Packers traveled to Chicago for a Monday Night matchup with their oldest rival. However, Green Bay exhibited very poor discipline and was plagued by numerous penalties, which had been a persistent problem ever since Mike McCarthy became head coach in 2006. The Packers lost the game 20–17. After this loss, the team returned home to face the 0-3 Lions in Week 4. They escaped with a 28–26 win, but it was an embarrassment to have given up that many points to a team that had not won in Green Bay since 1991 and which had won just two games over the last two seasons. The Packers' woes continued in Washington the next week. Clay Matthews ran Donovan McNabb down repeatedly in the first half of the game, but was then pulled with a hamstring sprain. This took most of the pressure off the Redskins' offense and the game tied at 13-13. Two minutes into overtime, Rodgers threw an interception and was knocked to the ground by Redskins defensive end Jeremy Jarmon with a concussion. Redskins kicker Graham Gano then booted a 33-yard field goal to win the game 16–13. Matthews and other key defensive players were missing from the Week 6 game at home versus Miami, leading to another overtime loss (23-20).