Jaron Brown or Cooper Kupp

I need a spot start this week and I’m torn… initially looking at stats and target shares it’s easily Brown… but Kupp is capable of have nice big games and SEA is historically (and currently) weak against slot WRs… Brown on the other hand has had the market share pretty much to himself with JJ Nelson and John Brown banged up but now they seem to be getting healthy and could possibly gobble up their shares… not to mention Palmer has me terrified against philly… yeah their secondary is bad but they get after the QB quite a bit and the Cards line is absolute trash… any opinions on this?