Any projection puts Allgeier at #2. Right now, if you take out Jamaal Williams, the best NFL rushing season by a BYU RB is either
Ty'Son Williams this season when he was mostly inactive and ran for 185 yards on 35 carries or
Eric Lane getting 80 carries in 1984 for 290 yards.
If I can't include Allgeier, I honestly likely move Taysom to RB and then carry another QB