Pele remains the benchmark, winning a World Cup at 17 and being the youngest scorer in a final. Kylian Mbappe is next, doing that at 19. They may not go all the way, but three days into the 23rd World Cup, some young players have already given notice of their potential. And Lamine Yamal has not even begun. At 16 years and three days, Bouaddi was deemed good enough by Lille to make his debut in the Conference League. (Reuters) Step forward Gilberto Mora and Ayyoub Bouaddi.