The Packers began their season at home against the Philadelphia Eagles. In the first quarter, Green Bay's Jarrett Bush recovered the Eagles' Greg Lewis's muffed punt in the end zone for a touchdown. The contest was tied in the closing minutes but the Eagles again muffed a punt return, setting up a 42-yard game-winning kick from Packers rookie kicker Mason Crosby. This was the only game the Packers did not score an offensive touchdown. Crosby was named NFC Special Teams Player of the Week. Crosby is the only player in league history to boot a 50-plus-yard field goal and game-winning field goal in the final minute in his first NFL game.
Question: who muffed a punt
Answer: Greg Lewis