Need RB Help with Carson on Bye

I have Chris Carson on bye and I was starting Kamara and Brieda but now Brieda is going to be out. I picked up Mostert and he is currently my RB2. Should I roll with Mostert as my RB2 or pick up Kalen Ballage or Rex Burkhead.

My Team -
QB - Josh Allen
RB - Kamara, Brieda, Mostert, Carson, L Murray
WR - Julio, Godwin, Sanu, G Tate, J Gordon, McLaurin
TE - Waller, Walker

I’d roll with mostert