His basketball journey began through a working group at the Marmstorf elementary school, where he played with his two older brothers Joshua and Jacob on the youth team of BG Harburg Hittfeld.

[10] In January 2025, following his stint with Anadolu Efes, Hollatz signed a three-year contract with German club Bayern Munich.

[11] In February 2021, Hollatz made his debut with the senior Germany national team, in a EuroBasket 2022 qualifier against Great Britain.

[12] In September 2022, Hollatz was one of the members who helped Germany win bronze at EuroBasket 2022, where he averaged 1.3 points and 2.8 assists per game.

[13] The following year, Hollatz helped Germany win the 2023 FIBA World Cup, averaging 2 points and 1 assist per game during the competition.