Peirone has played for San Lorenzo since he came through the youth system in 2003.
Ferreyra came through the youth system at his home town club of Banfield, and was promoted to the first team in the 2008-09 season.
He came through the youth system at Charlton Athletic, but was never offered a professional contract.
Ruiz came through the youth system at Nueva Chicago to break into the first team in 2005.
De Jong is one of several players in the current first team to come through the youth system.
Voboril came through the youth system of San Lorenzo to break into the first team in 2006.
Brown came through the youth system of Brentford, moving up from the under-18 squad to the first-team for the 2006-07 season.
The first came through the youth system in the 1970s, with the second joining from Chester City in 1984.
Smillie came through the youth system at Queen of the South.
Bush came through the youth system of Brentford and was given a youth team contract in 2008.
