Mannato was a versatile player who could play both in the back-row and on the wing. He earned three Italy caps during his career, debuting against the United States in 2004. The following year, Mannato featured in Italy's win over Argentina in Cordoba and scored a try in a loss to Australia in Melbourne. He appeared at club level with Roma, Gran Parma, Rugby Parma and Reggio Emilia, playing at the latter for eight seasons.[2][3]