[Goose]

I think Stanford lists Speights as 5' 11".

You are absolutely correct. I looked it up and then typed 8. My bad. Still, I would suggest that, while Speights can be a very strong, punishing running back, it is probable that he will do so in a style that differs significantly from Gerhart. The 30 lbs difference in weight does matter.   

[Goose]

I think Stanford lists Speights as 5' 11".

You are absolutely correct. I looked it up and then typed 8. My bad. Still, I would suggest that, while Speights can be a very strong, punishing running back, it is probable that he will do so in a style that differs significantly from Gerhart. The 30 lbs difference in weight does matter.