Simplify the following text for a Grade 5 native English-speaking person.
Original: Antonio LÃ pez Guerrero ( ; born 13 September 1981 ) is a Spanish footballer who plays for AtlÃ tico Madrid of the Spanish first division , mainly as a left defender .
Simplified: Antonio LÃ pez Guerrero ( born 13 September 1981 ) is a Spanish football player . He plays for AtlÃ tico Madrid .