Urban had a tendency to use co-DCs:
Luke Fickel was the other co-DC in both of Chris' years there
Luke was also the co-DC in Greg's first year running the Buckeye D in 2016
In 2017 it was only Schiano running OSU's D .
Ash might have done a good job , but Fickel was involved along with him running the D
Also Ash wasn't Meyer's DC at Jacksonville, he was the DB coach
The problem is that Harper is injured and might not return to his elite level for the remainder of the season.James praising Harper is just another indicator of his talent level .
