Las Pelotas is an Argentinian rock band that originated from the separation of an older and pioneer band called Sumo. It is an alternative rock band that currently holds one of the top spots in popularity throughout Argentina. Formed in 1988 in Buenos Aires. First line-up Germán Daffunchio (guitar) Alejandro Sokol (main vocals) Alberto "Superman" Troglio (drums) Willy Robles (bass) Second line-up Germán Daffunchio (guitar and backing vocals) Alejandro "Bocha" Sokol (main vocals)