There have been some successful NFL receivers who had workout numbers similar to Treadwell's. I calculated similarity scores based on Treadwell's 40 time, vertical, and broad jump. These 15 guys all had numbers in a similar ballpark to Treadwell, and have had some receiving success in the NFL (sorted from most similar to least similar):
Code:
Name 40 Vert Broad
Laquon Treadwell 4.67 33 117
Fred Davis 4.68 33 116
Michael Clayton 4.67 32.5 116
Martellus Bennett 4.68 34 118
Charles Clay 4.73 33.5 118
Kelvin Benjamin 4.61 32.5 117
Owen Daniels 4.65 34.5 114
Jermaine Gresham 4.66 35 113
Gary Barnidge 4.61 31 117
Plaxico Burress 4.59 33 115
Dennis Pitta 4.68 34 113
Mario Manningham 4.59 32 117
Aaron Hernandez 4.64 33 113
Willie Snead 4.62 33.5 112
Anquan Boldin 4.72 33.5 114
Julius Thomas 4.64 35.5 111
Treadwell does have a different body type than most of these guys - only Clayton & Boldin are similar there too (within 2" of height and 15 lb. of weight).