FC Schaffhausen until the end of the season. Middlesbrough On 14 August 2012, it was announced that Leutwiler joined Middlesbrough. He made his debut in a 3–1 win away at Preston North End in the League Cup third round on 25 September. It was his only appearance of the season; in addition he was an unused substitute for 42 Championship matches, 3 FA Cup games and 2 League Cup fixtures. He made his league debut for the club on 10 August 2013, in a 1–0 win over Charlton Athletic at The Valley, replacing Jason Steele for the last 12 minutes shortly after Lukas Jutkiewicz had scored the only goal of the game. A week later, with Steele still injured, Leutwiler made his first league start at home against Blackpool. He conceded after 83 minutes from Chris Basham but Marvin Emnes scored an equaliser in added time. Leutwiler's third and final league appearance of the season came on 23 November, in Aitor Karanka's first match in charge, away to Leeds United: in the last minute of the first half, Steele was sent off for a foul on Dexter Blackstock and Leutwiler was brought on at the expense of Emnes in a 1–2 defeat. Shrewsbury Town Following his close season release from Middlesbrough, Leutwiler became the eighth summer signing to join Shrewsbury Town in League Two on a two-year deal on 11 June 2014. He started the season as first choice goalkeeper, keeping a clean sheet in each of the first three rounds of the League Cup, all against higher division opposition, to set up a fourth round home tie with Chelsea. It was documented in February 2015 that Leutwiler had kept more clean sheets that season than any goalkeeper in Europe, 20 in 39 matches. Leutwiler broke the club record for most clean sheets in a league season, after keeping his 22nd clean sheet in a home match against York City, before clinching promotion to League One the following weekend with a 1–0 away victory at Cheltenham Town. 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