David Johnson

The resurgent season of running back Chris Johnson might be derailed for a bit after a helmet to the side of his left knee Sunday left him with a contusion and possible missed time. The Cardinals might also be missing backup Andre Ellington, who suffered a turf toe on the same possession as Johnson’s injury.

There is no official timetable for either’s return, coach Bruce Arians said Monday, but rookie David Johnson looks like the starter for now and “I have all the confidence in the world in him starting,” Arians said.

There is a chance the Cardinals would make a roster move later in the week to promote Kerwynn Williams from the practice squad to back up David Johnson and Stepfan Taylor. But Arians admitted he’d rather not make a move at this point, instead waiting to see how Chris Johnson and Ellington recover, the story said.