LeVeon Bell roster help

I play in a full ppr league with a short bench. QB, RB, RB, WR, WR, TE, FLEX, K, DST, BENCHx3, 2 IR.

My team
Kyler Murray
Davonte Adams
Dj Moore
Dj chark
Josh Jacob’s
James Robinson
Antonio Gibson
Raheem mostert
Darren waller
Leveon Bell
K Dst

Some dropped nick chubb on Saturday and I feel like in need to pick him up and place him on my IR. should I? I am having trouble deciding who I would drop as I can try to pick them up after waivers clear. At this point iam on lev bell but I’m over thinking it.
Thanks