5 players you didn't know played for Chelsea 

#1 Hernan Crespo (2003-2008)

Hernan Crespo signed for Chelsea in 2003

Hernan Crespo is widely regarded as one of the greatest strikers of his generation and after starring for River Plate in his native Argentina, he went on to global acclaim at first Lazio and then AC Milan

However, before making waves as the strike partner of Andriy Shevchenko at AC Milan and scoring a brace in the final of the 2005 Champions League, the former Argentine international had signed for Chelsea in the summer of 2003.

Just one season was spent at Stamford Bridge before a loan transfer was completed to the Rossonerri and despite returning after one year away, Crespo failed to displace Didier Drogba in the starting lineup before returning back to former side Inter Milan on loan.

Hernan Crespo was a Chelsea player for five years, but just two of those were spent at the club and while his record of 25 goals from 73 matches in all competitions might not exactly be disastrous, the fact that he came with such a high reputation but failed to make a mark at the club means that he does not enjoy the same adulation at Stamford Bridge that he did at Parma and Lazio.