 He played 57 times for his country scoring 18 goals between 1979 and 1989, scoring the last goal against Algeria at the 1982 World Cup.During his club career Letelier played professional football in Chile, Colombia, Brazil, Mexico, Peru and Venezuela.At international level, Letelier played for the Chilean team for an entire decade, making 57 appearances and scoring 18 goals between 1979 and 1989; his last international match came against Brazil on 3 September 1989.