New Orleans Saints' tailback Reggie Bush will not require surgery to repair a partially torn ligament in his left knee but will not play Monday night at Atlanta. Sources told ESPN that the former Heisman Trophy winner is likely to miss the rest of the season. ESPN's Chris Mortensen first reported Friday afternoon that Bush had a partial tear of the posterior cruciate ligament, and Saints' officials subsequently confirmed the injury. League sources told ESPN.com that Bush sustained the injury in a Nov. 4 game against the Jacksonville Jaguars and that it was aggravated in another game, and he has played the past month with it. "It just got to the point, though, where he couldn't [play] anymore," a league source said. "He's a tougher kid than people realize, but it was only getting worse. At this point, he's just really beaten up."