Diego Martins da Costa e Silva (born 3 October 1989 in Barcelos), known as simply Diego, is a Portuguese footballer who plays as a goalkeeper.
Diego started his football career at Sporting de Braga. In June 2008 he signed a 1+2 professional contract with the Minho club, but spent his first years as a senior or loan, to various clubs in the Portuguese second and third divisions.
Diego was capped once for the Portuguese U21s, in a friendly match. He also played for the U19 side in the 2008 UEFA European Football Championship elite qualification.