Not many. RBs went super fast and people went pretty deep.
EDIT: And yeah, it's PPR
Like Im assuming you picked 3rd (maybe second). I have Mixon as my 7th ranked RB, so since based on your draft I'm assuming you went Kamara, Mixon, Juju, Kittle. I'd say thats a really strong starting 4 picks overall even in a 8 person league. Like, Mixon might have lost a little value where you picked him but I'm guessing he was still among the best RBs available when you got him. Juju and Kittle were likely very good picks where you got them. Kittle especially since the gap between Kittle/Ertz and the next set of TEs is pretty big imo.