It might not be time to panic, but it is time to add Jonathan Dwyer if he's available in your league. He's the clear handcuff to Andre Ellington in Arizona, and Ellington is officially a player to worry about.
Ellington was limited in practice yesterday with a sore foot. Smallish running backs with an injury history dating back to college who have a foot injury before Week 1 are definitely cause for alarm. Ellington will apparently undergo an MRI to see what the problem is; we should know more later today or tomorrow.
Somewhat complicating matters for Week 1, in case the reports are inconclusive, is that the Cardinals play on Monday night. It's possible we won't know his status for certain until after teams need to make lineup decisions. If that's the case you definitely either want to have Dwyer available to plug in, or somebody else in your lineup.
Dwyer is nothing like Ellington, but he's the clear No. 2 and a better option than Stepfan Taylor.
In the meantime, we can all hold our breath on Ellington and hope this isn't a big deal. Seems like even in the best-case scenario -- he's fine! -- the Cardinals might use this little scare to ratchet back plans for his workload.
--Andy Richardson