In four seasons with the Charlotte Hornets, he was a fine complementary player but didn't meet the expectations of his draft billing (No. 11 overall in 2017). Monk bolted Charlotte in the summer of 2021 to sign a one-year, minimum-salary contract with the Los Angeles Lakers, and he was among the few bright spots for L.A. that season.

After rehabbing his value with the Lakers, Monk signed a two-year, $19.4 million contract with the Sacramento Kings in 2022. He continued to improve from there.

Monk averaged 13.5 points and 3.9 assists per game in 2022-23, finishing fifth in Sixth Man of the Year voting. The next season, he put up a career-high 15.4 points and 5.1 assists per game and was the 6MOY runner-up.