Wirth represented Chile at the 1982 FIFA World Cup, wearing the number one jersey. For Chile he played 12 matches, making his debut on 24 June 1980 in a friendly against Brazil.[1] In addition, he made appearances for the B-team in the friendly tournament 1985 Indonesian Independence Cup, where Chile became champion.[2]
After steps with Chile U20, women and men, between 2017 and 2021, he assumed as the Sport Director of Cobreloa for the 2022 season.[3]
Personal life
His father, Fernando, was a defender who played for Santiago Morning[7] and his older brother, Erwin, took part of Chile at under-20 level in the 1971 South American Championship.[8] His children are also athletes since his son, Rainer, is a former professional footballer who played as a goalkeeper and his daughter, Beatriz, is a Chile international field hockey goalkeeper.[9]