[5][8] White was lightly recruited out of high school, receiving no scholarship offers from any four-year institutions.

[9] At the time of his high school graduation, which fell about two months before his 18th birthday, White was barely six feet (1.83 m) tall—after growing two inches (5 cm) during his senior year.

[11] As it turned out, White nearly reached that potential height by the time he enrolled at Colorado–Colorado Springs, falling just 1 inch (2.5 cm) short.

In his junior season, White averaged 25.8 points, 7.3 rebounds and 5.2 assists for the Mountain Lions, leading the team to the 2015 NCAA tournament.

[22][23] On March 12, 2018, White scored a career-high 14 points along with four rebounds, an assist, and a block in a 109–93 loss to the Houston Rockets.

[24] On April 14, 2018, White made his NBA playoffs debut, coming off the bench with seven points, an assist, a steal, and a block in a 113–92 loss to the Golden State Warriors in Game 1 of the series.

[27] On December 31, White scored a career-high 22 points with three rebounds, three assists, two blocks and a steal in a 120–111 victory over the Boston Celtics.

[28] On January 10, 2019, he scored another career-high 23 points with eight assists, five rebounds, two steals, and a block in a 154–147 double-overtime victory over the Oklahoma City Thunder.

[30] On April 18 against the Denver Nuggets, he recorded a then-playoff career high of 36 points to give San Antonio a 2–1 lead in the first round of the 2019 playoffs.

[36] During Game 6 of the Eastern Conference Finals against the Miami Heat on May 27, White scored 22 points on 7-for-14 shooting, alongside five assists and three steals, in a 111–103 loss.

[38] In Game 1 of the NBA Finals on June 2, White had 21 points and three assists during a 120–108 comeback victory over the Golden State Warriors.

[40] Three days later, he was named Eastern Conference Player of the Week after averaging 24.5 points, 4.8 rebounds, and 7.5 assists as a starter in place of the injured Marcus Smart.

[42][43][44] He became the second player in NBA history to hit a buzzer-beating game-winner with his team trailing and facing elimination, joining Michael Jordan's "The Shot" in 1989.

[50] On March 18, 2024, White recorded his first career triple-double with 22 points, 10 rebounds, and 10 assists in a 119–94 victory over the Detroit Pistons.

[55] On August 24, 2019, White was included in the US national team's final roster for the 2019 FIBA Basketball World Cup.

[64] White has endorsement deals with the Boston-based beverage companies Samuel Adams and Culture Pop, and has appeared in commercials and on billboards advertising these brands.