Adam Wardziński began his Brazilian Jiu-Jitsu journey at age 18 under the mentorship of Polish grappling pioneer Karol Matuszczak. Quickly demonstrating exceptional talent and dedication, Wardziński started coaching a small group of students in Poznań while still a blue belt, steadily expanding his influence within Poland's BJJ community. His career took a significant leap forward after connecting with Alan do Nascimento, known as "Finfou," leading to his affiliation with Finfou's association. In October 2016, Wardziński earned his black belt, marking the start of his elite competitive career.

Widely recognized for possessing one of the most effective butterfly guards in modern Brazilian Jiu-Jitsu, Wardziński revitalized this classic position's prominence in high-level competition. His innovative approach seamlessly integrates butterfly guard sweeps with single-leg X transitions, complemented by heavy-pressure passing from half-guard and quarter-mount positions. Wardziński's butterfly guard and his signature arm-in Ezekiel choke have become so respected that even elite Brazilian competitors extensively study his techniques. His instructional series, "Butterfly Guard Re-Discovered," available on BJJ Fanatics, further solidified his reputation as a technical innovator and influential instructor.

In June 2024, Adam Wardziński made history by becoming the first European male to win an IBJJF Black Belt World Championship. Competing in the heavyweight division, Wardziński dominated four opponents over two days, primarily utilizing his signature butterfly guard to initiate sweeps and submissions. This groundbreaking victory resonated throughout the European Brazilian Jiu-Jitsu community, establishing Wardziński as the most accomplished European grappler of his era and marking a significant milestone for European athletes in a sport historically dominated by Brazilian and American competitors.

At the 2023 Pan Jiu-Jitsu IBJJF Championship, Wardziński delivered what many observers described as the "comeback of the decade." Facing Fellipe Andrew in the heavyweight final, Wardziński found himself trailing 9-0 on points. Demonstrating remarkable perseverance and competitive spirit, he launched a relentless offensive flurry in the final minute, securing a decisive last-second submission attack that earned him victory by advantages. This stunning performance highlighted Wardziński's resilience and killer instinct, further enhancing his reputation as an elite competitor.

Often described as "incredibly consistent," Wardziński has been a fixture on IBJJF podiums throughout his career. He consistently medaled at major tournaments, including multiple podium finishes at the IBJJF World Championships, Pan Championships, and European Opens. Notably, he secured double gold at the 2023 IBJJF European Open Championship and earned silver at the 2023 IBJJF World No-Gi Championship, demonstrating his versatility across both gi and no-gi formats. His sustained success and frequent podium appearances have earned him a top-3 IBJJF worldwide ranking among black belts, underscoring his longevity and consistency at the highest levels of competition.

Adam Wardziński's career significantly impacted the growth and recognition of European Brazilian Jiu-Jitsu, particularly in his native Poland. As one of the first internationally recognized Polish grapplers, he paved the way for future generations of European competitors. His butterfly guard techniques have influenced rising stars such as Amy Campo, Pedro Machado, and Osamah Almarwai, who have incorporated elements of his game into their own competitive styles. In June 2025, after becoming the first European IBJJF Grand Slam winner at the 2025 IBJJF World Championship, Wardziński symbolically left his belt on the mat, signaling his retirement from competitive Brazilian Jiu-Jitsu and cementing his legacy as one of Europe's greatest grapplers.