Born in
Libreville, Musavu-King moved to France in 1994, aged only two. In 2007, he joined
SM Caen's youth setup, after representing SC Hérouville and USON Mondeville. After already playing for the reserve team, Musavu-King made his first team debut on 17 November 2012, starting in a 3–1 away win against US Breteuil, for
the season's
Coupe de France. Six days later he made his
Ligue 2 debut, playing the full 90 minutes in a 1–0 home success over
Angers SCO. On 1 July 2013, Musavu-King renewed his contract for a further two seasons, until 2015, and was loaned to
ES Uzès Pont du Gard on 30 August. After returning from loan in the 2014 summer, he was included in the main squad in
Ligue 1. Musavu-King made his top level debut on 28 September 2014, starting in a 0–0 away draw against
RC Lens. He scored his first professional goal on 4 October in a 1–2 home loss against
Marseille. On 2 July 2015, Musavu-King signed a five-year deal with
La Liga side
Granada CF. On 28 January 2016, Musavu-King was loaned to
Ligue 1 side
Lorient until the end of the season. In July 2016, Musavu-King joined Italian club
Udinese on a free transfer.. On 31 August 2016, he was loaned to French club
Toulouse for the season. On 5 August 2017, Musavu-King was announced at
St. Gallen on a one-year loan. In January 2019, he signed for French third-tier club
Boulogne on a six-month deal with the option of a further year, and joined
Le Mans of Ligue 2 in August 2019. He left at the end of the 2019–20 season after Le Mans were relegated. On 10 March 2021, Musavu-King joined
Indian Super League side
Bengaluru FC. On 3 July 2021, he extended his contract for two more years keeping him at the club until 2023. He debuted for the club on 15 August in a 1–0 win over Maldivian side
Club Eagles in the
2021 AFC Cup qualifying play-offs. He later played in all three group stage matches against
ATK Mohun Bagan,
Bashundhara Kings and
Maziya S&RC. He made his ISL debut on 20 November against
NorthEast United FC in a 4–2 win. ==International career==