He has represented the Argentina national team, having previously playing for the under-19s and under-21s Argentina sides. His usual position is at fullback though he also plays on the wing. Before playing for the Warriors he played for fellow Scottish club Edinburgh.
Leonelli joined Saracens on 2 August 2007.
After being released by Saracens he has moved back to Argentina to play for Louisiana Tablada.
He played for Argentina during their two Test series win over Wales at home in June 2006, including scoring a try in the 27 to 25 victory. In his first season for Saracens, Leonelli was part of the side that reached the semi-finals of the EDF Energy Cup and the Heineken Cup for the first time in the club"s history. He scored the team"s try in their famous 19-10 win over the Ospreys in the quarter-final of the Heineken Cup.
