In the 2014–15 season, Lonergan made his first appearance of the season, but conceded three goals, in a 3–0 loss against Watford in the opening game of the season. By the August, the club had rotate both Lonergan and Bogdán over the first choice goalkeeper role before Lonergan won the role and was the first choice goalkeeper for the most of the season, due to Bogdán's injury. On 25 October 2014, Lonergan provided an assist for Craig Davies to score the third goal of the game, in a 3–1 win over Brentford. Throughout December saw Lonergan making an impression, as he kept three clean sheets and won the Bolton Wanderers Player of the Month award for December. Lonergan remained the first choice goalkeeper until he suffered a concussion after in the 65th minutes and was substituted as a result, in a 4–1 loss against Nottingham Forest on 21 February 2015 and said the concussion he sustained could have ended his career. Despite being cleared from a serious injury after a scan, Lonergan lost his first choice goalkeeper status role following the arrival of Ben Amos and spent the rest of the season on the substitute bench. Lonergan finished the 2014–15 season, making thirty–two appearance in all competitions.