After a breakout sophomore year where he was named second-team All-Southeastern Conference (SEC) by the league's coaches, Maten enjoyed a strong individual junior season, marred by a knee injury and the Bulldogs’ mediocre 19–14 record.[2] After averaging 18.2 points and 6.8 rebounds per game, he was named first-team All-SEC by the leagues’ coaches and second-team by the Associated Press. He was also named as a finalist for the Kareem Abdul-Jabbar Award for the nation's top center (despite starting the season on the watch list for the Karl Malone Award for top power forward).[3]
Following his junior season, Maten declared his eligibility for the 2017 NBA draft without an agent, leaving open the possibility of returning to Georgia for his senior year.[4] Ultimately, after working out for NBA teams he decided to return to Georgia for his senior year to improve his draft position.[5]
After not being selected in the 2018 NBA draft, Maten signed a two-way contract with the Miami Heat of the National Basketball Association (NBA) on July 29, 2018. Under the terms of the deal, he split his time between the Heat and their NBA G League affiliate, the Sioux Falls Skyforce.[9] On December 2, 2018, Maten scored a career-high 42 points to go along with 14 rebounds and 3 blocks in a 113–108 win over the Stockton Kings.[10] Maten was named NBA G League Player of the Month for December 2018.[11] On April 7, 2019, the Heat signed Maten to a standard NBA contract.[12] On July 29, 2019, Maten was waived by the Miami Heat.[13]
Maine Red Claws (2019–2020)
On September 17, 2019, Maten was reported to have signed with the Boston Celtics.[14] On October 20, 2019, Maten was reported to have waived by the Celtics.[15] On October 26, 2019, Maten was included in the training camp roster of the Maine Red Claws.[16]