Ilaix Moriba debuted for Barca B at 16 on Saturday, replacing Ferran Sarsanedas in the 67th minute of the 1-0 defeat by Ejea.
He played in the interior position, showing his usual daring and character against some tough treatment from the opposition.
The player, compared for years to a young Pogba, is one of the great La Masia talents and the club made a big effort to renew his deal.
He was, with Ansu Fati, one of the most exciting players to pen a new contract and both are racing up through the system as fast as possible.
Ansu scored in his second game with the first team and Ilaix, who in theory should be with Juvenil A, has debuted for Garcia Pimienta's Barca B.