Born in Volta Redonda, Rio de Janeiro, Marrony joined Vasco da Gama's youth setup in 2015.
[1] He made his first team debut on 24 January 2018, coming on as a second-half substitute for Rildo in a 2–1 Campeonato Carioca away loss against Cabofriense.
[9][10] His domestic league debut followed four days later in the 1–0 home win over Randers FC, coming on for compatriot Júnior Brumado in the 81st minute.
[11] Another four days followed before he made his first European appearance, replacing Gustav Isaksen in the 71st minute as Midtjylland lost 3–1 to Braga in the UEFA Europa League group stage.
[12] Vasco da Gama Atlético Mineiro Fluminense Marrony's cousin Ricardo Santos is also a footballer and a forward.