Arizona Cardinals injuries: Jerraud Powers, Andre Ellington day-to-day with injuries

The Arizona Cardinals got a win on Sunday in San Francisco, defeating the 49ers 19-13, but they also siffered some key injuries. Running backs Chris Johnson and Andre Ellington and cornerback Jerraud Powers are amon the walking wounded and, at least for Powers and Ellington, "there is no timetable" for their return to the field.

Arians, speaking to the media in his Monday afternoon media session, opened saying Powers had not hurt his Achilles. It is a calf strain and not serious. He compared it to a hamstring injury. In Arians' words, "JP is a fast healer," so he didn't leave it out of the question for him to be available this week in St. Louis.

Ellington suffered turf toe and his availability will be a matter of the pain he can tolerate.

Arians told the media Johnson suffered a knee contusion. Reports have since said he suffered a leg fracture and will miss significant time.

Arians spoke like rookie David Johnson will get the start and he said Kerwynn Williams would be the guy they bring up from the practice squad if they feel they do need a roster move, although he would prefer not to have to do that.

With the secondary depth hurting a bit, Arians said receiver Brittan Golden will get some time at nickel this week. It would appear he would fill the role Justin Bethel normally would when the team goes with seven defensive backs.