[2] After amassing a record of 12-0 (8 KO's), he accepted the challenge of fellow German contender Konstantin Airich and won via unanimous decision over eight rounds.

In his 15th professional fight on 15 November 2015, Schwarz faced the powerful 20-year-old German Ilja Mezencev for the vacant WBO Youth World Champion title.

[4] On 22 April 2017, Schwarz beat 40-year-old Bosnian Adnan Redzovic (18-1-0) by knockout in the second round to win the vacant WBO Inter-Continental heavyweight title.

[14] In April 2021, it emerged that Schwarz was on trial for allegedly punching his former partner Tessa Schimschar in the face in a restaurant car park in Lostau, Germany, in May 2020.

It is alleged that Schimschar was reportedly taken to a local hospital after receiving "a massive punch on the chin, which led to multiple fractures of the lower jaw", and that she subsequently filed a charge for grievous bodily harm.