Simplify the following text for a Grade 7 native English-speaking person.
Original: Lucas Ademar Bernardi ( born 27 September 1977 in Rosario , Argentina ) is a footballer who plays for Newell 's Old Boys as a defensive midfielder .
Simplified: Lucas Bernardi ( born 27 September 1977 ) is an Argentine football player . He plays for Newell 's Old Boys .