[1] Telch started his professional career in a 3–2 win against Ferro Carril Oeste on 9 September 1962.

In 1968 Telch won his first title with San Lorenzo, winning the Metropolitano, and becoming the first team in the professional era of Argentine football to complete a season without losing a game.

In 1972 Telch was part of the San Lorenzo team that won both of the Argentine league titles, this time they completed the Nacional championship without losing a game.

Telch is one of only five players to have won four league championships with San Lorenzo, the others being Sergio Villar, Victorio Cocco, Carlos Veglio and Agustín Irusta.

At the end of the 1975 season, Telch left San Lorenzo, by that time he had played 413 games for the club, scoring 25 goals.