 After missing the first two games due to a groin injury, Treacy made his first appearance since returning from a loan spell at Sheffield Wednesday, coming on as a substitute for Joseph Mills in the 73rd minute, in a 2–0 loss against Huddersfield Town on 25 August 2012.His poor performance against Plymouth Argyle in the second round of the League Cup led him being sent to the Development Squad.After months at the Development Squad, Treacy was recalled to the first team under the new management of Sean Dyche and made his first team return on 15 December 2012, coming on as a substitute for Danny Ings in a 1–1 draw against Watford.