Drmic was recruited to the United States to play at Boise State with fellow Australian Igor Hadziomerovic.[5] As a freshman in 2011–12, Drmic started all 29 games for the Broncos, averaging 12 points per game and set a school record for three-pointers by a freshman (57). At the end of the year, he was named honourable mention All-Mountain West Conference (MWC).[6]
As a sophomore in 2012–13, Drmic raised his scoring to 17.7 points per game, leading the Broncos to the 2013 NCAA tournament in the process. As a junior in 2013–14, he was named second-team All-MWC for the second year in a row, as well as All-District by the United States Basketball Writers Association.[7]
Prior to the start of his senior season, Drmic was named first-team preseason All-MWC.[8] However, he managed just seven games in 2014–15 after sustaining an ankle injury that ruled him out for the rest of the season. He subsequently applied for a medical hardship to play in 2015–16 as a fifth-year senior.[9]
In 2015–16, Drmic appeared in 31 games with 25 starts, averaging 13.4 points, 4.4 rebounds and 1.4 assists per game. He subsequently earned All-Mountain West Honorable Mention selection by the media. Drmic finished his college career as the school's all-time three-point record holder, the school's games record holder, two points shy of the school's all-time leading scorer, and at No. 5 on the Mountain West Conference all-time scoring list.[10]
Professional career
On 5 May 2016, Drmic signed a two-year deal with the Adelaide 36ers of the National Basketball League.[11][12] Drmic appeared in 27 games for the 36ers during the 2016–17 regular season and played an important role off the bench, averaging 14 minutes per game. He averaged 5.7 points and 3.4 rebounds per game, connecting on 45.2 percent of his field goal attempts. He led all rookies in scoring and rebounding, and as a result, he was named the recipient of the NBL Rookie of the Year Award. He became the fourth 36ers player to win the award, joining Mike McKay (1985), Chris Blakemore (1993) and Aaron Bruce (2009).[13]
In March 2017, Drmic joined the Southern Tigers of the Premier League.[14]
On 18 December 2017, Drmic was ruled out for three weeks after suffering a medial collateral ligament sprain in his left knee three days earlier playing against the New Zealand Breakers.[15] In 28 games for the 36ers in 2017–18, he averaged 6.6 points and 2.7 rebounds per game.
On 23 February 2018, Drmic signed with the Dandenong Rangers for the 2018 SEABL season.[16] He was named the SEABL Player of the Week for Round 3.[17]
On 1 May 2018, Drmic re-signed with the 36ers on a two-year deal.[18]
In May 2019, Drmic underwent surgery to relieve him of plantar fascia pain in both his feet, thus ending his 2019 Premier League season with the Southern Tigers.[19]
Following his completed contract with the 36ers, on 15 July 2020 Drmic signed a two-year deal with the Brisbane Bullets.[20]
On 17 April 2023, Drmic signed with the Tasmania JackJumpers for the 2023–24 NBL season.[22] Following the season, he re-joined the Bearcats for the 2024 NBL1 Central season,[23] where he was the league's leading scorer with 25.11 points per game.[24]
Drmic's older brother, Frank, played in the NBL with the South East Melbourne Magic, Victoria Titans, Sydney Kings and South Dragons between 1996 and 2007, winning a championship with the Magic in 1996.[26]