I own Grant and he has been awesome. However I will not abandon my draft RB's early strategy next year. Only a few RB have come off the waivers this year in our league (14 team). Fargas, Grant, Graham, and Chatman were the only non-drafted RBs this year that have played well. So I just lucked out that I had top waiver priority for Grant.
EDIT: Forgot about Kolby Smith