[7] In late July he was suspended by Kansas coach Bill Self after being involved in an altercation and did not participate in the team's exhibition trip to Italy.

[8] During his lone season with Kansas, Lawson led the Big 12 in both scoring (19.4 ppg) and rebounding (10.3 rpg).

Following Kansas' loss in the 2019 NCAA men's basketball tournament, Lawson announced his intention to forgo his final season of collegiate eligibility and declare for the 2019 NBA draft.

[11] On March 9, 2020, Lawson posted 33 points and 10 rebounds for his 10th double-double of the season during a 117–114 win against the Oklahoma City Blue.

[14] He played for the Boston Celtics in the 2021 NBA summer league, missing a single three point shot in his 4-minute debut, a 85–83 win against the Atlanta Hawks in which he started.