after going undrafted in the 2015 nba draft, jack signed with the indiana pacers on october 7, 2015. however, he was waived by the pacers on october 24 after appearing in one preseason game. five days later, he was acquired by the fort wayne mad ants of the nba development league as an affiliate player of the pacers. on january 4, 2016, he was traded to the reno bighorns in exchange for the returning player rights to christian watford.