season against Borussia Dortmund, he kept his first clean sheet, in a 2–0 win over Hamburg on 1 September 2012. Throughout the 2012–13 season, Mielitz was an ever present goalkeeper for the side, but received criticism from the media and pundits, including Frank Rost for conceding goals and lack of clean sheets, which he kept three times during the season. In response to criticism, Mielitz defended himself, saying: "I make my cause well!" and felt he was treated unfairly. During a 1–1 draw against 1. FSV Mainz 05 on 30 March 2013, he put out his best performance at Werder Bremen, making a lot of saves, to help the side ease their chance to avoid relegation. In the 2013–14 season, Mielitz continued to remain the club's first choice goalkeeper and started well keeping two clean sheets in the first two league matches against Eintracht Braunschweig and Augsburg. He also kept two more clean sheets while remaining first choice goalkeeper. However, as in the previous season, Mielitz continuously conceded goals on a regular basis, leading Kicker to say that he lacked "charisma, though he seems calm, factual, sometimes a little too pale." Following a 3–2 loss to 1. FSV Mainz on 24 November 2013, he was dropped as a first choice goalkeeper in favour of Raphael Wolf and was placed on the substitute bench for the rest of the season. In response to this, Mielitz said he was disappointed upon learning that he would remain on the substitute bench. He finished the 2013–14 season with 14 appearances. It was confirmed in April 2014 that Mielitz would not be offered a new contract by the club and was expected to leave the club at the end of the season. Although he did not play against Hertha BC, he made his farewell appearance and confirmed his departure from the club. SC Freiburg Shortly after leaving Werder Bremen, Mielitz was linked a move to SC Freiburg. The move was confirmed on 28 May 2014, as he signed a three–year contract. Mielitz made his SC Freiburg debut in the first round of the DFB-Pokal, in a 2–0 win over Eintracht Trier 05, keeping a clean sheet. He made another appearance in the second round of the DFB-Pokal once again, in a 5–2 win over 1860 Munich. However, he struggled to get more playing time at the club, with newly Roman Bürki being preferred as the