The thought was that he could have trouble getting off press man outside. This play...
...is not an example of that, at all. Humphrey has his eyes on the QB and is clearly playing cover 2 flat. Unfortunately one of both of the safeties was playing something else.
I learned exactly nothing about Worthy on this play. Of course he might prove that part of his scouting part wrong still. It's week 1 of his rookie season.