Marlon

Fluminense

Marlon joined the Fluminense academy at the age of 14; after progressing through the youth ranks, in 2014 he made his debut for Fluminense at the age of 18, in the Campeonato Brasileiro Série A, versus São Paulo in a 5–2 victory. Marlon ended his first season with 20 league appearances, and played twice in the Copa Sudamericana. Having missed the first part of the 2015 season due to international duty with Brazil U20, Marlon returned for the second half where he played as a starter for Fluminense. He played 24 games in the league.

Barcelona

On 8 June 2016, Marlon signed for Barcelona on a season-long loan. He played as a starter for their B team, helping them gain promotion from the Segunda División B (third division) to the Segunda División (second division) with 27 appearances between the regular season and the promotion play-offs. Marlon made his debut for the first team on 23 November 2016, in a Champions League group stage game against Celtic, coming on as a substitute in the 72nd minute for Gerard Piqué. Marlon's La Liga debut came against Las Palmas on 14 May 2017. After impressing on loan, Barcelona activated Marlon's loan clause from Fluminense for €5 million on a four-year contract.

Nice (loan)

In August 2017, Nice signed Marlon on loan. He made his debut in Ligue 1 against Monaco in a 4–0 win, and played a total of 23 league games. Marlon's loan ended early at the end of the 2017–18 season as manager Patrick Vieira…

Marlon represented Brazil internationally at the under-20 level at the 2015 FIFA U-20 World Cup, helping his side reach the final which they lost after extra time against Serbia. He also played at the 2015 South American U-20 Championship.

Marlon is a centre-back who can play in a back three, either on the left or the right. He is known for his physicality, stamina and heading, and can set up the game from the back with his passing. Serhiy Palkin, CEO of Shakhtar, defined Marlon as "one of the best defenders in Europe technically".

Marlon and his girlfriend Maria have two sons, Pedro and João Miguel Santos.