do PO running times matter as much? Im guessing you dont want to be stuck in the mud, but does he need to be sub 7.5?
The short answer is no. However, college coaches will take a player's 60 time into consideration, as a piece of their eval, when considering a player's overall level of athleticism. (or lack thereof)
As with everything, other considerations apply. If he throws 97, he can run a 9 flat 40 time, and still get a lot of love. If he's more of a "stock righty", the balance of all of his attributes will come into comparison with others.