The key to the defense? (Hint: It's not Patrick Willis)

His stance was too wide and he stood too upright.And, as a result of Ricky Jean Francois' sloppy technique, the 49ers defense was too soft when the second-year nose tackle replaced an injured Aubrayo Franklin in the fourth quarter of Sunday's 34-16 loss to the Packers.After Francois entered, Green Bay went on a game-sealing, 17-play, 74-yard drive during which it collected 53 of its 136 rushing yards. The smash-mouth drive featured 13 runs and marked the first time the Packers were able to have sustained success on the ground. Niners defensive coordinator Greg Manusky is rarely critical of a player when speaking with the media. So his less-than-flattering assessment of Francois' performance was notable. "He's got to back up Aubrayo," Manusky said, "and he's got to a better job of doing that when we call upon him." It's not clear how much the 49ers will need to call upon Francois on Sunday against visiting the Seahawks...