if he's ready go go- why would it be good to not play him? it will be great to have him back in the lineup, get a hawkeye win and get ready for next week.
i'm sure the staff has been diligent about monitoring him appropriately.
It makes me nervous too. Repeat concussions are a huge deal and are more common immediately following the first one. Let Coker get most of the carries. If he's not getting the job done, throw A Rob in. Otherwise, let him rest up for tOSU.