He reached the top of his field at continental level in 2006 with a gold medal in the shot put at the South American Championships in Athletics.

He began to make an impact at a greater regional level from 2010 onwards, taking a shot put bronze at the 2011 Pan American Games and two gold medals at the 2012 Ibero-American Championships in Athletics.

[3] In his first continental competition he won both the shot put and discus throw events at the 2000 South American Youth Championships in Athletics.

[9] He achieved little progress in his first senior year, with his sole medal (a bronze) coming in the discus at the 2004 South American Under-23 Championships in Athletics.

He was fourth in the discus but reached new distances in the shot put event, taking the silver medal with a significant improvement to 20.43 m. He was only beaten by Marco Fortes in the last series of throws.

[19] The 2011 South American Championships in Athletics was hosted in his home capital Buenos Aires and he defended his shot put title on the first day of competition.

[21] He represented Argentina in the first round of the shot put at the 2011 World Championships in Athletics, but the peak of his season came at the 2011 Pan American Games, where he won the bronze medal with a throw of 20.41 m.[13] Lauro took the indoor circuit for the first time at the start of 2012.

[15] In the outdoor season he threw a national record of 20.43 m in Mar de Plata and claimed a shot put/discus double at the 2010 Ibero-American Championships in Athletics, which included a discus best of 63.55 m.[22] This qualified him for the events at the 2012 London Olympics and in the Olympic shot put he threw 20.75 m in qualifying before hurling a personal best of 20.84 m in the final to finish in sixth place.

[24] At the Doha leg of the 2013 Diamond League he threw a South American record of 21.26 metres, taking second place in the shot put.