[2][10] On 12 February 2016, he scored a team-high 16 points in 28 minutes off the bench in a 100–63 loss to the New Zealand Breakers.
Adnam re-joined Melbourne United as a development player for the 2016–17 NBL season.
[19] After attending an NBA mini-camp run by the Dallas Mavericks during the 2018 off-season,[20] Adnam joined the Sydney Kings for the 2018–19 NBL season.
[21] The Kings finished the regular season in third place with an 18–10 record before losing 2–0 to Melbourne United in the semi-finals, despite Adnam's equal team-high 13 points off the bench in game two.
For the 2019–20 NBL season, Adnam joined the inaugural roster of the South East Melbourne Phoenix.
[23] He averaged career highs across the board and played every game the season had to offer.
[1] For the 2020–21 NBL season, Adnam was named co-captain of the Phoenix and helped them reach the semi-finals.
[26] On 16 January 2024, Adnam signed with the Illawarra Hawks for the rest of the 2023–24 NBL season as an injury replacement for Dan Grida, returning to the franchise for a second stint.
[31] On 6 July 2023, Adnam signed with CSU Sibiu of the Romanian Liga Națională for the 2023–24 season.
[52] In June 2017, Adnam was selected in the Australian Emerging Boomers squad for the Summer Universiade in Taipei.
[54] While playing for the Sydney Kings, Adnam was studying online for a Bachelor of Business (Sports Management) at Deakin University.