Cavallero was born in
Lomas de Zamora,
Buenos Aires Province. During his professional career he played for
Club Atlético Vélez Sarsfield – being second-choice to Paraguayan
José Luis Chilavert for most of his tenure–
Unión de Santa Fe,
RCD Espanyol,
RC Celta de Vigo and
Levante UD (the last three in Spain's
La Liga). With the last club, he also competed in the
Segunda División, appearing in 38 games out of a possible 42 in the
2005–06 season as it returned to the top flight. In his four-year spell with Celta, Cavallero won the
Ricardo Zamora Trophy in
2002–03 as the
Galician team
qualified for the
UEFA Champions League having finished fourth. He allowed 27 goals in 34 matches, a goals-per-match average of 0.79. Cavallero then moved to
Uruguay with
Primera División side
Peñarol, retiring in 2009 at the age of 35. ==International career==