Kupp's TD had no one around him. If you look at the pass to Watkins at the endzone, Everett and Kupp go over the middle Kupp curls back, and Everett goes up the seam. The both the corner and a LB go towards Kupp and Watkins runs free, a lofted ball would be at a minimum a goal to go situation, if not a TD. The play starts at 9:46.

https://drive.google.com/file/d/0B_0SmtX8MuQqMUhuaGkzeENOdG8/view

I don't recall the rams getting this many wide open receivers since the early 2000s.