Career
Grecco began his playing career in 1948 with Boca Juniors, he only played one game for the club a 3-1 defeat to Estudiantes de Louisiana Plata on 14 November 1948. Grecco scored 55 goals in 107 matches for Unión. He also enjoyed success in Colombia with Independiente Medellín and Santa Fe.
Grecco is Independiente Medellín"s all-time leading goal scorer with 92 goals in 166 games, and he was the top goal scorer in the 1957 Fútbol Profesional Colombiano with 30 goals.
Grecco died 24 August 2008 in Medellín.