Rafael Martins Claro dos Santos (born 29 November 1991), known as Rafael Martins, is a Brazilian professional footballer who plays as a goalkeeper for Guarani, on loan from Brasil de Pelotas. He has been at the club since 2007, but has had few opportunities, making his debut against Ponte Preta in 2016 Campeonato Brasileiro Serie B, and having a short run of games at the end of 2018 Campeonato Brasileiro Serie B due to an injury to first-choice Wilson.
He spent two months on loan with Sampaio Correa in 2016, prior to his Coritiba debut, but was substitute goalkeeper in all 12 games.