Simplify the following text for a Grade 7 native English-speaking person.
Original: Choi Yong-Soo ( born September 10 , 1973 , in Busan , South Korea ) is a professional footballer for JÃ bilo Iwata of the J. League , the top professional football league in Japan .
Simplified: Choi Yong-Soo ( born 10 September 1973 ) is a former South Korean football player .