Fran Merida
Arsenal went to a lot of trouble to sign the Merida from Barcelona when he was a youngster, with the player actually ending up having to pay a fine to the Catalan club for failing to honour a pre-contract with the side. Despite this, the Spaniard did not impress for the North London club and eventually ended up at Atletico Madrid. He failed again there, and is now without a club after being released by Brazilian team Atletico Paranaense.