He is the third Polish rider in history, after Jerzy Szczakiel and Tomasz Gollob, to win an individual World Championship title.

[1] He was awarded the Order of Polonia Restituta, V class in 2019[2] and won the Polish Sports Personality of the Year title in 2020 becoming the second speedway rider to accomplish this feat.

[4] Zmarzlik made his British league debut in 2014, agreeing a short-term deal to ride for the Birmingham Brummies to cover the injured Adam Skornicki.

In July, he was part of the Polish team that won the gold medal in the 2023 Speedway World Cup final[16] and then he secured a fourth Grand Prix win in Latvia, which equalled the 22 career Grand Prix wins of fellow Pole Tomasz Gollob and put him just one behind Jason Crump.

[17] Despite being disqualified from the Danish Grand Prix for wearing the wrong leathers, he won the final round in Toruń, to win his fourth world title.