Simplify the following text for a Grade 5 native English-speaking person.
Original: NÃ lson Augusto Tomar Marcos ( born 10 June 1983 in Ilha do Sal , Cape Verde ) , simply NÃ lson , is a Portuguese footballer of Cape Verdean descent who plays for CA Osasuna on loan from Real Betis , as a right defender .
Simplified: NÃ lson Marcos ( born 10 June 1983 ) is a Portuguese football player .