"Smallish build" is a very friendly description for a 5'7" dude.
2 inches shorter than Welker, Steve Smith, Jamison Crowder, and TY Hilton. 3 inches shorter than Edelman, Tyreek Hill, Desean Jackson, and Golden Tate. 1 inch shorter than Tavon Austin.
Agreed that it’s definitely better the biggest barrier to him succeeding, but other short guys have made a career in this league. If you can get open and make guys miss, it doesn’t always matter.