I agree. Grimes is a good back. If he were to play somewhere like Blackman or Riverdale, he would be getting a lot more exposure.
I do not however think he is the best. I believe that the Riverdale team has better backs than both Blackman and LaVergne. Rico Turner(Blackman) is not a power back but a speed back, and that is why he has so many yards.
All in all, if Grimes were playing in another school he'd be getting more attention because he is good, but he is not as good as Spike McDaniel or Rico Turner.
