Buy low Evan Engram? Half ppr redraft

Footclan - my RB core in this 8 team half ppr (two flex) redraft league is Zeke, CMC, Mixon, Mckinnon, Jamaal, Aaron Jones, Kerryon, and Sony!

Evan Engram was offered to me in exchange for RB depth. I have Howard.

  1. Should i acquire Engram after his concussion? Will he be fine for week 1?

  2. should I trade Jamaal or Kerryon for Engram? Which RB should I keep, knowing I also have Aaron Jones?