Janis Blaswich

Early career

Blaswich started his career at Borussia Mönchengladbach, where he was loaned out to Dynamo Dresden, and Hansa Rostock. He later joined Dutch club Heracles Almelo ahead of the 2018–19 season.

RB Leipzig

On 15 February 2022, Blaswich signed a contract with RB Leipzig, effective from 1 July 2022 to 30 June 2025. On 20 August, he made his debut for Leipzig in a 1–2 away loss against Union Berlin. On 5 October 2022, during a Champions League matchup against Celtic, Leipzig's longtime keeper Péter Gulácsi suffered a torn ACL rupture, which would force him to miss the rest of the season, in which Blaswich immediately replaced him in the 13 minutes of the first half, in a match which ended in a 3–1 victory. Three days later, he played a full 90-minute matchup as a replacement in a 1–1 away draw against Mainz 05. He later managed to achieve his first titles at the club, by winning the DFB-Pokal and DFL-Supercup. On 1 September 2023, he extended his contract with RB Leipzig until 2026. On 22 June 2024, Blaswich joined Austrian Bundesliga side Red Bull Salzburg on a season-long loan deal.

Bayer 04 Leverkusen

On 11 August 2025, Blaswich joined German side Bayer Leverkusen for a reported fee of €2 million with an additional €1 million worth of add-ons, signing a contract which ends on 30 June 2027.

In November 2023, Blaswich was called up for the Germany national team by coach Julian Nagelsmann, ahead of their friendly matches against Turkey and Austria.

As of match played 22 August 2026

Dynamo Dresden 3. Liga: 2015–16 Hansa Rostock Mecklenburg-Vorpommern Cup: 2018 RB Leipzig DFB-Pokal: 2022–23 DFL-Supercup: 2023