OP: I say Bledsoe. KC has the highest passing yards allowed per game in the NFL. I see a shootout, and at the worst, he'll get some easy points in garbage time.

lacticacid: Johnson, based on the matchup. Stl is like KC in that it allows and scores a lot of points. Every QB looks like a star when he plays StL. For WR, I'd also start Robinson, based on the same logic. Robinson is definitely higher risk than Branch, but I think higher EV as well.