Scored 94th percentile in measurables from his workouts.
His success rate vs press coverage was 51 percent, which is not good if you want him to play outside, i.e. X.
His success rate vs man coverage was 66.3 percent, which is average among the last two years' prospects.
His success rate vs zone coverage was 81.9 percent, which is quite good (82nd percentile).
He spent roughly 1/3 of his time lining up at each receiver position XYZ.
Outstanding hands demonstrated by very low drop rate of 2.7.
Most of his routes were of the short and in-breaking variety with the scheme designed to get him the ball. Above-average run routes were screen, curl, and dig. Slants were run among average. 64.3 percent of his routes were run on basically four patterns, all being the aforementioned short ones.
The above stats were provided by "reception perception" database. Seems like Zay was shoehorned into doing what the team needed and while he will be a bit of a project if a team drafts him to play X, he does have the measurables to play out there.
Personally, I don't think he's got the performance in space (elusiveness, tackle breaking, etc) to call him "explosive" which seems to be what the Rams want. So if they go WR I doubt he's the guy. If they do take him, he will probably take a year or so at least under this staff to get all the routes down and start outside.