Simplify the following text for a Grade 4 native English-speaking person.
Original: Juan Valera EspÃ n ( born December 21 , 1984 in Murcia ) is a Spanish footballer who plays for AtlÃ tico Madrid in the Spanish first division .
Simplified: Juan Valera EspÃ n ( born 21 December 1984 ) is a Spanish football player . He plays for AtlÃ tico Madrid .