Kenedy made his professional debut aged 17 for Fluminense, scoring five goals in 40 official games before a £6.3 million move to Chelsea in 2015.

[3] He began his career at local club Santarritense before moving to Friburguense in Rio de Janeiro state at the age of 11, going on to Vasco da Gama and Atlético Mineiro before arriving at Fluminense.

[9] A week later, Kenedy made his debut against Crystal Palace, coming on as a 68th-minute substitute for César Azpilicueta in a 2–1 home defeat.

[14] After struggling with injuries, manager Walter Mazzarri, confirmed that Kenedy had returned to Chelsea on 12 December after a disappointing loan spell.

[15] After being recalled by Chelsea from his loan spell with Watford, Kenedy made his return for the Blues in their 4–0 home victory over Brentford in their FA Cup fourth round tie.

Following the incident, Chinese media outlets were ordered to withdraw stories related to Chelsea from homepages and apps and the Ministry of Foreign Affairs confirmed that there was a remote possibility of a ban for the club.

[24] Kenedy impressed on his Newcastle debut, creating Jamaal Lascelles opener from a corner kick in a 1–1 draw with Burnley.

[28] Kenedy had a particularly poor match in a goalless draw at Cardiff City on 18 August, he avoided a red card for a kick at Víctor Camarasa, became the first player since 2010 to play a full Premier League first half without completing a pass and his penalty in added time to win the game was saved by Neil Etheridge.

Kenedy originally named as part of the Brazil under-20 squad for the 2015 World Cup in New Zealand, but missed the tournament with appendicitis, being replaced by Malcom as the team ended as runners-up.

[39] An NBC Sports article by Nicholas Mendola in 2018 credited Kenedy's versatility, stating "The Brazilian left-sided man can play virtually any field position besides center back".