Simplify the following text for a Grade 7 native English-speaking person.
Original: Julen Guerrero LÃ pez ( born 7 January 1974 ) is a retired Spanish footballer , who played solely for Athletic Club de Bilbao .
Simplified: Julen Guerrero ( born 7 January , 1974 ) is a former Spanish football player . He has played for Athletic Bilbao and Spain national team .