Aarón Caricol, known as Aaron Martin, was deemed surplus to requirements by Espanyol only this time last year. He was allowed to leave on loan to German Bundesliga side FSV Mainz 05, in a deal which had just a €6 million buy out clause attached. It took until only November of the same year for Mainz to decide they were going to activate this.
If we fast-forward one year from his move away from Spain, he is now one of the most exciting young left-backs in German football, with a €40 million buy-out clause in his new contract. If a club were to pay that fee to sign Martín, it would make him the third most expensive left-back in the history of football, behind only Lucas Hernandez and Benjamin Mendy. It has certainly turned out to be an excellent piece of business from Mainz, and they will hope the Spaniard stays committed to continuing his development at the Opel Arena for as long as possible.
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