On March 15, 2023, the Bundesliga side RB Leipzig announced that they had signed the midfielder from Germany's top division club, FC Schalke 04,Ligue 1 Focus for an undisclosed fee.
The signing of the German international is expected to strengthen the team's midfield depth and provide competition for places in the starting XI. Klostermann has been a key player for his club over the past few seasons, contributing to their success both domestically and in Europe.
He has played a vital role in helping Schalke win promotion back into the Bundesliga after two seasons in the second tier. His experience and leadership qualities will be important assets for RB Leipzig as they look to compete at the highest level in Germany and beyond.
The signing of Klostermann is also significant for the future of the club's academy. With the young talent already present at the club, it is hoped that he can continue to develop and contribute to the team's progress in the years to come.
Overall, the signing of Klostermann by RB Leipzig is a positive move for the club and its fans. It shows that the club is committed to building a strong squad and developing its own players.