Lionel Messi, at the age of 17 years, three months, and 22 days, makes his first appearance in a league match for Barcelona as a substitute against Espanyol. He becomes the youngest player to play for the club in an official game after joining the renowned La Masia academy in 2000. Prior to this, he had transferred from Newell’s Old Boys in Argentina at 13 years old.
Source: cnn.com
