Menor spent high school at San Beda College in Mendiola, Manila where he was a vital cog for the Red Cubs in the NCAA Juniors Division.
They swept the eliminations of the 79th season of the NCAA paving the way for a duel with the Mapua Robins for the 2003 Juniors basketball championship.
He stayed at La Salle for a week before he had a change in heart and opted to return to San Beda College.
With Menor contributing consistently with averages of 8.6 points, 6 rebounds, and 1.9 assists in 14 games, he finally delivered on his promise as they won the NCAA championship against the PCU Dolphins.
Due to injuries to key players Mark Cardona and Chris Ross, Menor was re-signed by the Bolts.