José Arnulfo Montiel Núñez is a Paraguayan footballer who plays as a midfielder for 12 de Octubre.
Scouts from Olimpia Asunción noticed his talent and signed him to the youth divisions of the Asunción club. Montiel was a key part of the Paraguayan national under-15 team that won the U-15 South American Championship in 2004.
His professional debut came playing for Olimpia late in 2004, at the age of 16. Montiel's excellent vision and skills secured him a place in the first team. In 2005, he eventually made the Paraguay national football team squad at the age of 17.
After the 2006 World Cup, Montiel joined Udinese Calcio. However, following just one season with the club, he was sold to Reggina. In the 2008–2009 season, he was loaned to the Romanian Liga I team Politenica Iaşi, helping them to avoid relegation.
