Growing up in Raleigh, North Carolina, Clemons idolized Allen Iverson and sought to incorporate Iverson's crossover dribble into his playing style. Despite standing 5'9, Clemons could dunk in high school at Millbrook. Campbell coach Kevin McGeehan recruited him due to his confidence and 44-inch vertical leap. In a state tournament game as a senior, Clemons broke the school single-game record with 41 points.
College career
Clemons averaged 18.5 points per game as a freshman at Campbell and was named the Big South Freshman of the Year. Shooting 18-of-32 from the field, Clemons scored 51 points in an 81-79 win over UNC Asheville in the Big South Tournament as a sophomore, breaking the tournament scoring record. He became the fourth player to score 50 points that season. Clemons was named to the First Team All-Big South in his sophomore season. As a sophomore, Clemons averaged 25.1 points per game, second highest in Division I behind Marcus Keene, and took 42.2 percent of his team's shots, the highest percentage in college basketball. With 904 points, Clemons set the school record for points in a season. Clemons had a season-high 42 points against Liberty on January 23, 2018 and alongside Marcus Burk became the first teammates in NCAA history to each hit 10 threes in a game. He passed the 2,000 point mark in his career on February 7, scoring 33 points in a win against Gardner–Webb. On March 14, Clemons passed Jonathan Rodriguez as Campbell's all-time leading scorer, adding 32 points in a win against Miami. Clemons repeated on the First Team All-Big South as a junior and received seven first place votes for conference player of the year. As a junior, Clemons averaged 24.9 points per game, fourth highest in the nation. He helped the Camels go 18-16 and play in the College Basketball Invitational. After the season, Clemons declared for the 2018 NBA draft but did not hire an agent, thus preserving his collegiate eligibility. He decided to withdraw from the draft and return to Campbell. Coming into his senior season, Clemons was named Preseason Big South Player of the Year. On December 21, 2018, Clemons became the all-time leading scorer in Big South history. He passed VMI guard Reggie Williams' 2,556 career point total in a game against Austin Peay. He led NCAA Division 1 in scoring with 30.1 points per game and became the third highest scorer in college basketball history.
Professional career
Houston Rockets (2019–present)
After going undrafted in the 2019 NBA draft, Clemons joined the Houston Rockets for the 2019 NBA Summer League, and later signed an Exhibit 10 contract with the Rockets. On October 17, the Rockets converted him to a two-way player. Clemons made his NBA debut on November 3, scoring 16 points in a 129–100 loss to the Miami Heat. On November 16, with Russell Westbrook and Eric Gordon sidelined due to injury, Clemons scored a career-high 19 points in a win over the Minnesota Timberwolves. On December 27, the Houston Rockets announced that they had converted the contract with Clemons into standard NBA contract. Clemons recorded 14 points and three rebounds on January 10, 2020, in a 113–92 loss to the Oklahoma City Thunder. Clemons had his jersey retired at Campbell during the NBA All-Star Break.
