Because of his style, Antonio Javier Arias nickname is Castrilli, after the famous Argentinian ref Javier Castrilli (who's nickname was The Sheriff). Arias Alvarenga was born in Puerto Casado and became a referee in 1992.
He is a CONMEBOL Elite category referee.
Thanks to his job as a referee Arias Alvarenga managed to finish his physical education studies.
Arias was selected for the 2011 World Cup u20.
He is on the long list of 52 for the 2014 World Cup.