He was drafted 13th overall in the 2015 NBA draft by the Phoenix Suns
On March 24, 2017, Booker became the youngest player to score over 60 points in a game, finishing with 70 against the Boston Celtics
On July 7, 2018, Booker signed a five-year, $158 million maximum contract extension with the Suns
In March 2019, at 22 years old, Booker became the youngest player in NBA history with consecutive 50-point games
In February 2020, he was named a finalist to play on the 2020 United States men's Olympic basketball team, but the 2020 Olympics were cancelled due to COVID-19