Matias "Mati" Brain Peña (born January 15, 1974 in Santiago) is a Chilean triathlete. Nicknamed "Mati", Brain competed at the first Olympic triathlon at the 2000 Summer Olympics. He took forty-first place with a total time of 1:53:44.90. References Profile 1974 births Living people Chilean male triathletes Pan American Games competitors for Chile Olympic triathletes of Chile Triathletes at the 1999 Pan American Games Triathletes at the 2000 Summer Olympics Sportspeople from Santiago 20th-century Chilean people 21st-century Chilean people