Utah receivers (not TE or RB, just WR) over 100 yards:
Covey: 59/611/1
Dixon: 23/475/1
Nacua: 30/357/5
Simpkins: 16/297/2
Mariner: 13/171/1
Enis: 10/145/1
Total for those 6: 151/2056/11
BYU receivers (not TE or RB, just WR) over 100 yards:
Shumway: 20/319/3
Hifo: 26/273/1
Romney: 13/162/2
Pau'u: 16/159/1
Collie: 18/153/1
Simon: 12/107/0
Total for those 6: 105/1173/8
So if we're just comparing Utah and BYU (which appear to be Roberts' two likely destinations), BYU throws 69.5% as many passes to WR, for 57.1% of the yards and 72.7% of the TD.