Need WR, Metcalf or Boykin? And which backup RB to cut?

I have a team with too many RBs and not enough WRs. Trades are hard to make so I’d like to cut one of my bench RBs and sign a WR with upside. Two I am looking at are DK Metcalf, SEA and Miles Boykin, BAL. Which should I pick? And which backup RB should I cut… Ty Montgomery (NYJ or Jamaal Williams, GB? Thanks!