Ronald Pereira Martins (born 14 June 2001), simply known as Ronald, is a Brazilian professional footballer who plays as a winger for Swansea City. Club career Born in Corumbá, Mato Grosso do Sul, Ronald began his career with hometown side Corumbaense. He made his first team debut at the age of 17 on 2 February 2019, coming on as a second-half substitute in a 2–0 Campeonato Sul-Mato-Grossense away win against Operário de Dourados. Ronald scored his first senior goal on 16 February 2019, netting his team's third in a 3–1 home win against Aquidauanense. He also spent a period on a trial at Atlético Mineiro before signing for the under-20 side of Atlético Goianiense. Ronald started to appear in the first team of Dragão in January 2021, but was loaned to Grêmio Anápolis on 24 February 2021, until the end of the Campeonato Goiano. After helping the latter side win the competition for the first time ever with two goals (one of them against his parent club) in 14 appearances, he signed a permanent deal with Grêmio Anápolis and subsequently returned to Atlético for the Série A, on loan. Ronald made his debut in the main category of Brazilian football on 30 May 2021, starting in 1–0 away win against Corinthians. On 20 January 2022, Grêmio Anápolis sent Ronald on loan to Série B side Guarani. On 13 July 2022, Ronald's loan spell at Guarani was cut short and he was instead sent on a season-long loan to Liga Portugal 2 club Estrela da Amadora. At the end of the campaign, following Estrela's promotion to the Primeira Liga, Ronald's loan was extended for another season. In January 2024, Ronald signed a three-and-a-half-year contract, with an option for a further year, with EFL Championship side Swansea City, for a fee reported to be between €1.5 million and €2 million. He was praised by head coach Luke Williams after playing for the team, whilst Ronald said that he wanted to be successful for his family in Brazil.