Simplify the following text for a Grade 8 native English-speaking person.
Original: Mario Ignacio Regueiro Pintos ( born 14 September 1978 in Montevideo ) is an Uruguayan footballer who plays for Club AtlÃ tico LanÃ s in Argentina .
Simplified: Mario Regueiro ( born 14 September 1978 ) is an Uruguayan football player .