(Darryl Webb / AP)

Running back Reggie Bush doesn’t expect to miss any significant length of time after hurting his knee Sunday in the Detroit Lions’ 25-21 loss to the Arizona Cardinals.

Bush left the game after taking a hit to his left knee in the first half and, when he returned in the second half, he promptly fumbled. After that, he was done for the day. He’ll have an MRI today, but ESPN’s Adam Schefter reports that the team doesn’t think the injury is serious and that he could be available to play Sunday against Washington.

“I’m not too concerned,” Bush said (via the Detroit Free Press). “We’ll see how it goes [Monday] and take it one day at a time. I’m not too concerned, though. I think I’ll be all right and I’m going to do everything I can to get back on the field Sunday, even if I have to rehab 24 hours a day.”

Bush, who gained 191 yards in the opener against Minnesota, no doubt is well aware that the Lions’ next opponent, the Redskins, have a defense that is last in the NFL against the run.

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