Jason Campbell doesn't appear likely to return for the Washington Redskins this season, leaving the team's playoff hopes resting on the arm of longtime bench-warmer Todd Collins. An MRI on Campbell's dislocated kneecap revealed that the injury probably would not require surgery, Coach Joe Gibbs said Friday. The normal recovery time is about four weeks, but the coach and Campbell tried their best not to rule out a return. "We're taking things day by day and week by week," said Campbell, standing on crutches with a brace around his left leg. "We'll see how things improve over the next couple of weeks. The thing I have to do right now is stay off it as much as possible and let the swelling get out of it and see what happens." Washington (6-7) likely needs to win its final three games - all against teams jockeying for playoff position - to reach the postseason.