Albion fans have already had the chance to see Valero this year - he featured as a substitute just two weeks ago at the Hawthorns when West Brom entertained Real Mallorca in a pre season friendly.
Valero has become Albion's ninth summer buy, taking outgoings to £20 million. £4.7 million of that was handed to the La Liga side this afternoon as the 23 year old midfielder signed a four year contract with the option of another year..
He has become Albion's most expensive player ever, breaking the previous record of £3.5 million splashed out on Robert Earnshaw from Cardiff City in 2004.
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