Manuel Rosas was the youngest goal scorer in World Cup history until the player who scored how many goals in his career broke his record?
Manuel Rosas:  With the first goal he scored during the World Cup, he became at the time the youngest player to have scored in the FIFA World Cup, a record later broken by Pelé, although Rosas remains second youngest. Pelé:  According to the IFFHS, Pelé is the most successful league goal-scorer in the world, scoring 1281 goals in 1363 games, which included unofficial friendlies and tour games.
1281