Janek is not only a successful grappler and Muay Thai fighter, but also one of the most prominent players on the Polish light heavyweight MMA scene. Janek is one of the most talented and appreciated fighter in his weight class, as evidenced by the finalization of discussions with the Ultimate Fighting Championship, which he joined from the end of January 2014 contract for the fights. The Career in the UFC, started with a win at a gala in Sweden, brought Janek both the sweetness of victory, and education in the form of failures, however, the he is always extremely positively perceived by local fans thanks to determination and heart to fight. JOHN, because that is the nickname of the person, appellant in many of optimism, not only by his joyful disposition, but also a commitment to excellence despite many adversities such as a few severe injuries he suffered in his career.