He made his first ever appearance for the club on 15 July 2016, coming on as a half-time substitute for Carl Ikeme in a 2–0 win over Crewe Alexandra at Gresty Road, assisting Joe Mason for the second goal. Lonergan's first competitive appearance for Wolves came on 9 August, in a 2–1 League Cup First Round win over Crawley Town at Molineux. On 28 January 2017, with Ikeme suspended, Lonergan missed Wanderers' fourth-round FA Cup tie at Liverpool due to injury.