Simplify the following text for a Grade 5 native English-speaking person.
Original: AgustÃ n AranzÃ bal Alkorta ( born 15 March 1973 in Bergara , San SebastiÃ n , Gipuzkoa ) is a retired Spanish footballer who played as a left defender .
Simplified: AgustÃ n AranzÃ bal ( born 15 March , 1973 ) is a former Spanish football player .