Arias joined Colo-Colo after taking part in a championship in the Estadio Nacional as a member of the team of normal school from Victoria city.

[2] In 1953, he switched to the traditional rival, Universidad de Chile,[3] becoming the fifth player to make it directly after Alfonso Domínguez, Pedro Hugo López, Jorge Peñaloza and Javier Mascaró.

[7] Considered a Fernando Riera's disciple,[8] at youth level he worked for clubs such as Green Cross, with whom he began his career,[9] Colo-Colo,[10][11] Filanbanco, Deportes La Serena, among others.

[13] In the top division, he led Rangers (1968),[14] Audax Italiano (1971),[15] Colo-Colo as interim (1974),[16] Santiago Morning (1978–79)[17] and Deportes La Serena (1990–91).

[19] In 1973, he coached the Chile national amateur team with views to the 1975 Pan American Games, previous to the Chilean coup d'état.