[2] Cormack was given a rookie contract with South Australia for the 2016–17 season[2] and was named in the state's squad for the 2016–17 Matador BBQs One-Day Cup.
[5] He was thrown in the deep end when the team's captain, Callum Ferguson, decided he would open the bowling after New South Wales won the toss and chose to bat first.
Making the task more daunting was the fact that four of New South Wales' top six batsmen had represented Australia in international matches.
Despite the difficult task presented to him, Cormack impressed with bowling figures of 1/42 from 10 overs, taking the key wicket of New South Wales captain Moises Henriques.
[9] South Australian coach Jamie Siddons was excited ahead of the season of the prospect of Cormack playing a few games for the team because of his ability to bowl a doosra, a ball which spins in the opposite direction to his normal delivery.