As a sophomore in 2009–10, he averaged 14 points, four rebounds, two assists and three steals per game as he led Hamilton SE to a 17–4 record.

As a junior in 2010–11, he averaged 18.6 points, 5.0 rebounds, 3.0 assists and 2.7 steals per game as he led the Royals to a 20–4 record and a trip to the Class 4A regional finals, capturing just the second sectional championship in school history.

[2] In November 2011, Harris signed a National Letter of Intent to play college basketball for Michigan State University.

[1] As a senior in 2011–12, Harris averaged 25.4 points, 7.4 rebounds, 3.1 assists and 4.0 steals per game as he led the Royals to a 22–3 record, advancing to the Class 4A sectional final.

He finished his high school career with a school-record 1,540 points (16.7 ppg), 467 rebounds (5.1 rpg), 232 assists (2.5 apg) and 232 steals (2.5 spg).

[2] Harris was also an outstanding football player at Hamilton SE, playing wide receiver in his sophomore, junior and senior years.

[5] On July 31, he signed his rookie-scale contract with the Nuggets after averaging 18.6 points, 4.2 rebounds, 2.6 steals and 2.0 assists in five Summer League games for the team.

[6] After missing the first seven games of the 2014–15 season due to a back injury, Harris made his NBA debut on November 14 against the Indiana Pacers.

[10] He earned the Nuggets' starting shooting guard spot for the 2015–16 season, going on to score a then career-high 20 points on November 20 in a loss to the Phoenix Suns.

[21] In his first game back on December 15 after missing 16 straight, Harris scored 18 points in a 132–120 win over the Portland Trail Blazers.

[30] On February 1, 2018, he made the winning three-pointer at the buzzer and finished with 25 points to lift the Nuggets to a 127–124 victory over the Oklahoma City Thunder.

[36][37] On March 25, 2021, Harris, R. J. Hampton and a future first-round pick were traded to the Orlando Magic in exchange for Aaron Gordon and Gary Clark.

Joy was a four-year letterwinner at Purdue from 1987 to 1991, and currently ranks seventh in school history with 1,747 points; a 1991 first-team Kodak/WBCA All-American, she went on to play in the WNBA for the Detroit Shock in 2000.