This is a list of the players from Argentina currently in MLS. I've done lists similar to this in the past, but I received an email requesting that I do a list with only the Argentine players. I've listed each player's hometown and the club that they were at before making the move to Major League Soccer.
Facundo Erpen COL
Hometown: Gualeguaychu, Argentina
Club: Talleres de Cordoba (Argentina)
Christian Gomez COL
Hometown: Ramos Mejia, Argentina
Club: Arsenal de Sarandi (Argentina)
Guillermo Barros Schelotto CLB
Hometown: Buenos Aires, Argentina
Club: Boca Juniors (Argentina)
Nicolas Hernandez CLB
Hometown: Buenos Aires, Argentina
Club: Cobreloa (Chile)
Gino Padula CLB
Hometown: Lanus, Argentina
Club: Montpelier HSC (France)
Marcelo Gallardo DC
Hometown: Martinez, Argentina
Club: Paris-Saint Germain (France)
Franco Niell DC
Hometown: Buenos Aires, Argentina
Club: Argentinos Junior (Argentina)
Gonzalo Peralta DC
Hometown: Munro, Argentina
Club: Almirante Brown (Argentina)
Pablo Ricchetti DAL
Hometown: Buenos Aires, Argentina
Club: Quilmes (Argentina)
Dario Sala DAL
Hometown: Cordoba, Argentina
Club: Arsenal de Sarandi (Argentina)
Franco Caraccio HOU
Hometown: Buenos Aires, Argentina
Club: Arsenal de Sarandi (Argentina)
Eloy Colombano KC
Hometown: Pehuajo, Argentina
Club: Defensa y Justicia (Argentina)
Claudio Lopez KC
Hometown: Rio Tercera, Argentina
Club: Racing Club (Argentina)
Carlos Marinelli KC
Hometown: Buenos Aires, Argentina
Club: Sporting Braga (Portugal)
Matias Cordoba RSL
Hometown: Lanus, Argentina
Club: Club Atletico Tigre (Argentina)
Fabian Espindola RSL
Hometown: Buenos Aires, Argentina
Club: Sociedad Deportivo Quite (Ecuador)
Matias Mantilla RSL
Hometown: Buenos Aires, Argentina
Club: Defensores de Belgrano (Argentina)
Javier Morales RSL
Hometown: Buenos Aires, Argentina
Club: Salamanca (Spain)
Facundo Erpen COL
Hometown: Gualeguaychu, Argentina
Club: Talleres de Cordoba (Argentina)
Christian Gomez COL
Hometown: Ramos Mejia, Argentina
Club: Arsenal de Sarandi (Argentina)
Guillermo Barros Schelotto CLB
Hometown: Buenos Aires, Argentina
Club: Boca Juniors (Argentina)
Nicolas Hernandez CLB
Hometown: Buenos Aires, Argentina
Club: Cobreloa (Chile)
Gino Padula CLB
Hometown: Lanus, Argentina
Club: Montpelier HSC (France)
Marcelo Gallardo DC
Hometown: Martinez, Argentina
Club: Paris-Saint Germain (France)
Franco Niell DC
Hometown: Buenos Aires, Argentina
Club: Argentinos Junior (Argentina)
Gonzalo Peralta DC
Hometown: Munro, Argentina
Club: Almirante Brown (Argentina)
Pablo Ricchetti DAL
Hometown: Buenos Aires, Argentina
Club: Quilmes (Argentina)
Dario Sala DAL
Hometown: Cordoba, Argentina
Club: Arsenal de Sarandi (Argentina)
Franco Caraccio HOU
Hometown: Buenos Aires, Argentina
Club: Arsenal de Sarandi (Argentina)
Eloy Colombano KC
Hometown: Pehuajo, Argentina
Club: Defensa y Justicia (Argentina)
Claudio Lopez KC
Hometown: Rio Tercera, Argentina
Club: Racing Club (Argentina)
Carlos Marinelli KC
Hometown: Buenos Aires, Argentina
Club: Sporting Braga (Portugal)
Matias Cordoba RSL
Hometown: Lanus, Argentina
Club: Club Atletico Tigre (Argentina)
Fabian Espindola RSL
Hometown: Buenos Aires, Argentina
Club: Sociedad Deportivo Quite (Ecuador)
Matias Mantilla RSL
Hometown: Buenos Aires, Argentina
Club: Defensores de Belgrano (Argentina)
Javier Morales RSL
Hometown: Buenos Aires, Argentina
Club: Salamanca (Spain)