#3 Ilaix Moriba | Valencia
Like Olmo, Ilaix Moriba went on to play for RB Leipzig, but the teenager did sign a professional contract with Barcelona in his early days. After two years at Espanyol, Moriba moved to La Masia, where he spent nine years, graduating in 2019.
Notably, European heavyweights like Juventus monitored Moriba's progress and tried to poach him from the Blaugrana. However, the star remained in Spain, signing his first professional deal with his boyhood club.
He enjoyed some game time with Barcelona's first team, making 18 appearances in the 2020-21 season. He then moved to RB Leipzig last summer.
However, the German outfit certainly had the future in mind when they made that transfer. They sent him out on loan to Valencia in the January transfer window, where he has made nine appearances so far. Although he is just 19-year-old and still growing, the future is certainly bright for Moriba.
#2 Mauro Icardi | PSG
Mauro Icardi's professional career has been a display of success across two countries - Italy and France.
He never played a first-team game for Barcelona. However, he was notably fought over in 2007, when a number of European clubs wanted to get him to their academies as well. He eventually joined Blaugrana's academy, but stayed a short time, leaving the club in 2011 on loan to Sampdoria.
His success at Sampdoria led Inter Milan to come after Icardi. The attacker flourished with the Nerazzurri, scoring 124 goals in just 219 appearances in all competitions.
However, he eventually moved to Paris Saint-Germain on loan in 2019. He scored 20 goals in 34 games for the French side that season, ensuring they kept him on. So far, he has made 91 appearances in all competitions, scoring 38 goals for the Parisian giants.
#1 Thiago Alcantara | Liverpool
After joining a series of academies as a child, Thiago eventually spent the last three years of his youth training at La Masia. In 2008, he signed a professional contract with the Blaugrana. He rose through the ranks to secure a spot for himself within the competitive Camp Nou midfield.
It took the star two years to gain a consistent position in the first team. By the end of his Barca career, he had played 100 senior games for the Spanish giants.
The Spanish international eventually moved on to Bayern Munich in 2013, where he achieved great success.
At Barca, he had won four La Liga titles, as well as six other trophies. With Die Roten, however, Thiago won the Bundesliga seven times, while winning another nine trophies.
The 30-year-old midfielder now plays for Liverpool at Anfield, where he might see out the rest of his trophy-laden career.