 He represented Rosario Central, Feyenoord, FC Den Bosch, Sporting de Gijón, Rayo Vallecano, CD Numancia, Hércules CF and Club de Gimnasia y Esgrima La Plata, in a 15-year senior career.From 2002 to 2005, while in Spain, Graff experienced two relegations from La Liga (one with Rayo, another with Numancia).In that country, in which he played nearly one decade, he appeared in 235 official matches, 94 of those in the top division; he scored his only goal in the competition on 2 March 2005, as Numancia held hosts Levante UD to a 1–1 draw.