In his pro career, Montecchia won the South American League and Argentine League championships in 1996. He also won the European-wide 2nd-tier level EuroCup championship in the 2002–03 season. He was the South American League's MVP in 2008.
Argentine national team
Montecchia was a regular on Argentina's senior national team, with which he won a gold medal at the 2004 Summer Olympic Games.