Thamba came off the bench during his first two years at Baylor. As a freshman, he averaged 1.8 points and 2.2 rebounds per game. He averaged 2.3 points and 2.2 rebounds per game as a sophomore.[3] In his junior season, Thamba became a starter for one of the top teams in the nation. He averaged 3.6 points and four rebounds per game, helping Baylor win its first NCAA tournament title.[4] On 26 February 2022, Thamba scored a career-high 18 points in a 80-70 victory against Kansas.[5]
Thamba's father, Emmanual, works in customs in the Democratic Republic of the Congo.[1] His older brother, Levy, fatally fell from a hotel balcony in 2014 after consuming a marijuana edible.[6]