8) Mendieta to Middlesborough
Mendieta was a great player that made his name playing for Spanish club Valencia. He was signed by Lazio in 2001 for ÂŁ29million. Sadly, he struggled to continue the form he had shown at Valencia, and went out on loan for a season at Barcelona. He wanted to leave Lazio permanently was Steve McClaren convinced him to join Middlesborough, where he made just 83 appearances in 4 years before retiring.