On August 17, 2023, Lars Ritzka extended his contract with FC St. Pauli, ensuring his stay at the club for the coming seasons. The extension reflected the club's confidence in his abilities and Ritzka's commitment to contributing to the team's future successes.

On March 10, 2023, Lars Ritzka played a notable match for FC St. Pauli against their rivals Hamburg SV. His performance was impressive as he contributed defensively to help secure a draw. This match was significant as it highlighted Ritzka's growing influence within the team and his ability to perform under pressure.

Lars Ritzka concluded the 2021-2022 season with FC St. Pauli on May 15, 2022. The season was a challenging one, but it provided Ritzka with valuable experience in the 2. Bundesliga. His performance over the season was marked by his consistent efforts on the pitch and ability to adapt to different tactical setups.

On June 4, 2021, FC St. Pauli confirmed the signing of Lars Ritzka from SC Verl. Returning to a club he knew from his past, Ritzka was excited about the opportunity to play at a higher level in the 2. Bundesliga. This move was seen as a strategic reinforcement for the team's defensive line.

Lars Ritzka transferred to SC Verl on July 21, 2020. His move to SC Verl marked a new chapter in his career as he sought to gain more first-team experience and continue his development as a footballer. At SC Verl, Ritzka was expected to contribute to the team with his defensive skills and agility on the field.

On July 1, 2017, Lars Ritzka joined the reserve team of FC St. Pauli, known as FC St. Pauli II. This was an important step in his career as it provided him the platform to showcase his talents and football skills on a professional level, giving him exposure and experience in a competitive environment.

Lars Ritzka was born on March 7, 1998. Little is known about his early life, but he would eventually grow up to become a professional footballer. This birth date marks the beginning of his journey in life leading to his later career in sports, where he would make a name for himself as a dedicated and talented player.