#2 Gerard Pique
Pique developed his talent in the Barcelona youth academy before moving to United in 2004. In four seasons at United, he struggled to play regularly and made just 23 appearances for the club.
He had a season-long loan spell with Real Zaragoza in the 2006-2007 season. In an unexpected twist, Barcelona signed him for just five million pounds in 2008.
The player Pique would become in the next couple of seasons would make him 10 times more valuable. He cemented a regular starting berth at Barcelona, and created an astonishing legacy by winning the La Liga seven times, UEFA Champions League four times and Copa Del Rey six times.
All in all, Pique has won 26 titles with Barcelona. His exploits even enabled him to be a starter for Spain as they won the 2010 World Cup and 2012 European Championship.