ALLEN PARK, Mich. (AP) - The Detroit Lions began their first practice since Reggie Bush was injured without him on the field. Bush was not with Detroit's running backs during the early parts of practice open for the media Wednesday. Lions coach Jim Schwartz said MRI results on Bush's banged-up left knee were encouraging on Monday, but didn't say whether he would play at Washington. If he can't play against the Redskins, the running backs on the roster are: Joique Bell, Theo Riddick and Mikel Leshoure. When Bush has been healthy, the Lions have scored 34 points in a win over Minnesota Vikings and led Arizona 14-10 at halftime. Without Bush playing much in the second half Sunday, Detroit's offense was scoreless during a 25-21 loss to the Cardinals.