Dynasty Fantasy Football running back tiers 2021: After Najee Harris, you won't find rookie workhorse RBs | CBS Sports Headlines Dynasty Fantasy Football running back tiers 2021: After Najee Harris, you won't find rookie workhorse RBs Fewer and fewer backs see 300 touches in a season and Najee Harris looks … Continue reading Dynasty Fantasy Football running back tiers 2021: After Najee Harris, you won't find rookie workhorse RBs