Leon Sturm

Leon Sturm is a German poker professional whose trajectory has caught the attention of the high-stakes community for his rapid ascent and methodical approach to the game. Born in Germany in 2001, he began his online poker grind as “Rumukulus” and “RUMUKULUS,” mastering the large-field tournaments and mixed formula events that sharpened his ability to adapt and learn.

On the live circuit he made his mark in June 2023 when he captured his first bracelet in the WSOP $50,000 High Roller, earning US $1,546,024, a clear signal of his arrival among elite live competitors. He continued adding to his resume with a 3rd place finish in the $100k Ultra-High Roller at WSOP Paradise in December of that year. Recently, in mid-2025 he placed 2nd in the Wynn Summer Classic $25,800 Eight-Max, for US $295,225. following it up with a 48th-place finish in the 2025 WSOP Main Event, finishing ahead of fellow GTO LAB Coaches Thomas Boivin and Ike Haxton, and eventually in August 2025, he topped the field in the EPT Barcelona €100,000 Super High Roller for €1,450,385, which remains the largest live score of his career so far. His total recorded live earnings now exceed US $10.9 million.

What sets Sturm apart is his combination of a studious mindset and a calm, process-oriented attitude. Rather than simply chasing results, he emphasizes understanding the “why” behind his actions, a quality that aligns well with coaching and structured study. He treats every tournament as a rich source of refinement; each score, each deep run, each decision under pressure becomes data to be processed, structured and improved.

As a coach, Sturm brings this deliberate style to the table: he values clarity over noise, structure over chaos, and deep understanding over surface tricks. Whether dissecting solver-driven ranges, explaining mindset under pressure, or mapping practical decision trees for live play, he is comfortable working at the intersection of theory and execution. Off the felt, he remains grounded, recognising that discipline, humility and continuous refinement are as important as any single result.

In short: Leon Sturm offers students of the game not only the credentials of a top-tier performer but the mindset of a lifelong learner. His coaching philosophy centers on building clear frameworks for decision making, structuring study in a way that leads to consistent improvement, and ensuring practical application so that theory truly influences live play, aligning seamlessly with GTO LAB’s mission of clarity, structure, deep understanding, and practical application.