Diogo de Almeida Santos (born 13 November 1984) is a retired Portuguese professional footballer who played most successfully for U.D.

Born in Vila Franca de Xira, Lisbon District, Santos started his senior career with U.D.

On 19 June 2013, Santos moved abroad after agreeing to a two-year contract at SR Brașov in the Romanian Liga I.

Santos played his first match in the Portuguese top flight on 12 August 2018 at the age of 33 years and nine months, coming on as a late substitute in a 1–0 away loss to C.S.

[10] In June 2022, Portugal's Supreme Court of Justice allowed Santos to proceed in a lawsuit against American video game company Electronic Arts for the alleged unauthorised use of his name and image in their FIFA series.