Oskar Münchow is a German professional wrestler who debuted in 2019 and competed for Westside Xtreme Wrestling (wXw), where he is a former wXw Academy Trophy Champion, before joining New Japan Pro-Wrestling as a Young Lion under the name Oskar Leube and going on excursion in Europe in 2024 alongside fellow Young Lion Yuto Nakashima. He and Nakashima returned to Japan on August 17, 2025, now known as OSKAR and Yuto-Ice, debuting as The Knockout Brothers and members of Bullet Club War Dogs, with the team quickly becoming one-time IWGP Tag Team Champions only a few months later. Following the dissolution of Bullet Club in January 2026, OSKAR joined the Unbound Co. faction alongside Nakashima.