Matías always played at the San Isidro Club, debuted in first division in 1988, forming one of the most memorable first lines, with Juan José Angelillo and Diego Cash.
Also, in 1993, with Buenos Aires Selection, he was part of the team who beat the Springboks 28–27, being one of the most valuable players of the match, which earned him a nomination for the Olimpia Award that year.
In 1995, he played his only World Cup, where Argentina showed a high level, despite all the previous problems, losing against England[1] for 24–18, match in which the English could not score any tries.
Then, after the Rugby World Cup, and rejecting offers to play in several of the best clubs of Europe and Oceania, he decided to study a master in marketing in Boston[2] University, USA.
Matías has completed three Ironmans: Florida and the Rio de Janeiro in 2009 and China in 2010, where he recorded 1h.15m.52s., swimming, 5h.55m.11s, cycling and 4h.56m.01s., running, totaling a 12h.19m.28s time of pure activity without breaks or intervals.