Matt Waldman shares his RSP pre-draft NFL scouting report on 49ers WR Dante Pettis — his top-ranked receiver in this 2018 class.  1. Dante Pettis, Washington (6-0, 186) Depth of Talent Score: 87.7 = Starter: Capable of a larger role and learning on the go. Pettis is the reason that, if I’m seeking a top receiver in this…