Simplify the following text for a Grade 8 native English-speaking person.
Original: Jamaal RaShaad Jones Charles ( born December 27 , 1986 in Port Arthur , Texas ) is an American football running back for the Kansas City Chiefs of the National Football League .
Simplified: Jamaal Charles ( born December 27 , 1986 in Port Arthur , Texas ) is an American football running back . He plays for the Kansas City Chiefs of the National Football League ( NFL ) .