NEW YORK — The NFL will limit the number of underclassmen who can receive evaluations for the draft to five from a single school, although special exceptions will be allowed. Concerned about the record 107 underclassmen who applied for this year's draft, and with 37 of them not selected, the league's College Advisory Committee developed new guidelines for players considering forfeiting their final years of eligibility. Troy Vincent, the league's head of football operations, said Friday the underclassmen will be advised on their potential to be picked in the first or second round.