Diogo Mateus de Almeida Maciel

In December 2017 he signed for Ferroviária for 2018 Campeonato Paulista. At the end of the campaign he renewed his contract with the club, but was not registered for their Série D campaign, being loaned instead to CRB in April for their 2018 Campeonato Brasileiro Série B campaign. In April 2019, after spending the 2019 Campeonato Paulista campaign with Ferroviária, he signed another loan agreement with Coritiba.

In 2014 he was made part of the squad for 2014 Campeonato Brasileiro Série A, and made his top-flight debut against Botafogo on 27 April. In May 2015 he joined Vitória on loan. He became first choice in his position as the team won promotion from 2015 Campeonato Brasileiro Série B. He was unable to agree a deal beyond the end of his loan spell with the club, and signed instead for Ponte Preta in March 2016. However, he could not break into the first team, and by August 2016 he had returned to Vitória, on loan until the end of the season. He returned to Ponte Preta, but was not registered for the 2017 edition of Campeonato Paulista, and in February he signed for Criciúma, with a desire to achieve another promotion from Série B.

Diogo Mateus came through the youth ranks with Internacional. During the 2012–13 seasons, whilst with the Under-23 side, he had a loan spell with Porto B, making his senior debut on 18 August 2012 against União Madeira. He stayed in Portugal with Portimonense, signing a loan deal for the 2013–14 season, however this was not a success, and he played in only one game before returning to Brazil prematurely in December.

Diogo Mateus de Almeida Maciel (born February 13, 1993) is a Brazilian footballer who plays as a right back for Kawasaki Frontale on loan from Ferroviária.