When your arms are long, it's hard to put up that many reps. And it means Metcalf's numbers are equally ridiculous, if not more ridiculous.
Bottom line, they're both ridiculously strong.
They're both very physical players too, so that strength translates over to the game.
There's three early round skill players that has a skillset that meshes with what Sam Darnold does well:
DK Metcalf
JJ Arcega-Whiteside
Hakeem Butler
These are physical, 50/50 ball winners. Deontay Burnett has a lot of that in his game, but he isn't a big, physical target like these three have shown.