Simplify the following text for a Grade 4 native English-speaking person.
Original: RubÃ n de la Red GutiÃ rrez ( born 5 June 1985 in MÃ stoles , Madrid ) is a retired Spanish footballer who played as a central midfielder .
Simplified: RubÃ n de la Red ( born 5 June 1985 ) is a Spanish football player .