Burghausen and Kaiserslautern Pollersbeck grew up in
Emmerting in
Upper Bavaria and initially played at the local club DJK Emmerting as a youth player, before moving to
Wacker Burghausen at the age of 16, the
3. Liga club, which at that time was by far the most successful club in his home district
Altötting. From the 2011–12 season, he was included in the squad of the under-19 team in the second-tier Under-19 Bayern League and the second men's team in the sixth-tier
Landesliga Bayern. In
2012–13 he played seven games in the
Bayernliga for the recently promoted second team, and sat on the bench in three games for the first team in the 3. Liga. After the season, Pollersbeck moved to
1. FC Kaiserslautern. For the 2014–15 season he moved up to the first-team squad and received a professional contract in November 2014. The young goalkeeper made his professional debut in the
2. Bundesliga on 11 September 2016 in the 0–2 away defeat against
SV Sandhausen after substituting for
Stipe Vučur in the 74th minute, after regular goalkeeper
André Weis had been sent-off. Pollersbeck also represented the team in the following games and stayed in goal even after Weis' return from suspension. Pollersbeck's contract with Kaiserslautern ran until 2020.
Hamburger SV For the 2017–18 season, Pollersbeck moved to
Bundesliga club
Hamburger SV, where he signed a four-year contract. In the pre-season, Pollersbeck competed with
Christian Mathenia for the starting spot in the HSV goal. During the test matches as part of the preparation for the season against
Holstein Kiel and
Sparta Rotterdam, Pollersbeck made mistakes, each of which led to goals conceded. Shortly before the start of the season, HSV coach
Markus Gisdol finally decided on Mathenia as the starter. In order to gain match experience, Pollersbeck made his first appearance for the
second team in the fourth-tier
Regionalliga Nord on 2 October 2017. Due to poor form, Pollersbeck briefly lost his place as backup to regular third keeper
Tom Mickel in November 2017. After the last game before winter break, Gisdol held an open competition for the number one spot again. After the winter preparations, Pollersbeck finally replaced Mathenia as the starter. He made his Bundesliga debut on 13 January 2018 in a 0–1 defeat in the away game against
FC Augsburg. After the second game of the spring season, Pollersbeck lost his place to Mathenia under the new coach
Bernd Hollerbach. After
Christian Titz, the third coach of the season, had taken over the team, Pollersbeck became the starting goalkeeper again from matchday 27. He played 10 Bundesliga games in his first season as HSV suffered relegation to the
2. Bundesliga. Also in the 2018–19 season, Pollersbeck kept his starting place under Titz and his successor
Hannes Wolf and made 31 appearances in the league. Although he finished 12 games without conceding a goal, which was the second best value behind
Rafał Gikiewicz from
Union Berlin who had 14, he was rated the worst goalkeeper by
kicker sports magazine among 16 goalkeepers rated. His training performance was also criticised. HSV finished in 4th place and missed out on promotion. Before the 2019–20 season, a new goalkeeper was signed in
Daniel Heuer Fernandes. Under new head coach
Dieter Hecking, Pollersbeck was demoted to third goalkeeper behind Heuer Fernandes and Tom Mickel. He also had to give his shirt number 1 to Heuer Fernandes. Until the winter break, Pollersbeck was in the matchday squad for both league and a
DFB-Pokal games. In addition, he played five times for the second team in the Regionalliga Nord. In early January, during the winter break, Pollersbeck tore a ligament in his left ankle during practice and was unable to attend the winter training camp. However, he returned to team practice at the beginning of February. After Heuer Fernandes was unable to convince in league games, Pollersbeck returned in goal on matchday 29 and played the last 6 league games. As in the previous year, HSV finished the season in 4th place and missed out on promotion.
Lyon Pollersbeck joined
Ligue 1 club
Lyon in September 2020 on a four-year deal, for an initial fee of €250,000 that could rise to €300,000. After the departure of backup keeper
Ciprian Tătărușanu to
Milan, Pollersbeck became the new backup to starter
Anthony Lopes. He did not make his debut with the French club until 6 March 2021, in a 5–2 victory against
Sochaux in the
Coupe de France. On 31 January 2023, Pollersbeck joined fellow
Ligue 1 club
Lorient on loan until the end of the season. On 13 June 2023, Lyon announced that a mutual agreement had been reached with Pollersbeck to terminate his contract with the club upon his return from Lorient, making him a free agent on 1 July 2023.
1. FC Magdeburg On 15 June 2023, Pollersbeck signed a contract with
2. Bundesliga club
1. FC Magdeburg.
Jahn Regensburg On 27 June 2024, Pollersbeck moved to
2. Bundesliga club
Jahn Regensburg. ==International career==