Leutwiler continued in his role as first-choice goalkeeper at Shrewsbury until a back injury ruled him out of a home match against Blackpool in September 2015, ending a run of 54 consecutive starts in the Football League, losing his place to Mark Halstead. He was immediately reinstated on his return to fitness, although he suffered concussion and facial injuries in a televised FA Cup second-round match at Grimsby Town in December which saw Halstead deputise for him once again. He returned to the side for an away match at Burton Albion, as Shrewsbury beat the league leaders 2–1.