Alfonso Subero Calvo (born 18 January 1970 in Calahorra, La Rioja), commonly known as Tito Subero, is a Spanish retired footballer who played as a goalkeeper, and later worked as a coach. A youth product of local club Logroñés, Tito went on to play 18 games in La Liga for Deportivo Alavés during the 1998–99 season. He retired in 2006 at the age of 36.