In 2017 University of Kentucky coach John Calipari came to the Whitnall High School gymnasium to see Herro play in person.

[7] Sources: Herro averaged 14.0 points, 4.5 rebounds, and 2.5 assists as the only player to start in all 37 games for the Kentucky Wildcats.

[2] On February 27, 2019, he scored a collegiate career-high 29 points, making 9 of 10 field goals and all of 6 free throws, to lead the Wildcats to a comeback victory over the Arkansas Razorbacks, 70–66.

[8] Among other distinctions earned, he was named an All-Freshman First Team selection by Basketball Times as well as the Southeastern Conference Rookie of the Year by the Associated Press.

[2] On April 12, 2019, Herro declared for the 2019 NBA draft, forgoing his final three years of college eligibility and hiring an agent.

[11] On October 23, he made his NBA debut, starting in a 120–101 victory over the Memphis Grizzlies and finishing the season-opener with 14 points to go along with 8 rebounds, 2 steals and an assist.

[12] In his fourth game (and first non-start), Herro scored a career-high 29 points on October 29 in a 112–97 win over the Atlanta Hawks.

[24] On February 17, he grabbed a career-high-tying 15 rebounds, alongside 11 points and four assists, in a 112–120 loss to the Golden State Warriors.

On October 23, 2021, Herro became the first player in Heat franchise history to record at least 30 points and 10 rebounds off the bench, which he achieved in a 102–91 loss to the Indiana Pacers.

[27] On April 5, 2022, he scored a season-high 35 points, alongside six rebounds and three assists, in a 144–115 win over the Charlotte Hornets.

[28] Herro was named the 2022 NBA Sixth Man of the Year, making him the first player in Heat franchise history to win the award.

[34] On November 27, Herro recorded his first career triple-double with 11 points, 11 rebounds and 10 assists in a 106–98 victory over the Atlanta Hawks.

[35] On December 15, Herro put up a career-high 41 points on 10-of-15 shooting from three-point range alongside five rebounds in a 111–108 win over the Houston Rockets.

[41] On April 24, 2024, in Game 2 of the First Round against the Boston Celtics, Herro put up 24 points, five rebounds, and a playoff career-high 14 assists in a 111–101 victory to even the series.

In turn, Herro also portrayed himself in the White Men Can't Jump remake starring Harlow.