Radzikowski made the finals of the 2012 World's Strongest Man contest in Los Angeles, California and finished in 6th place overall. Radzikowski has competed regularly in the Strongman Champions League 2012 season, finishing third in Poland and second in Spain. Radzikowski finished second at the 2012 World Log Lift Championships, and second at the 2012 Arnold Strongman Classic-Europe. Radzikowski finished third at the 2012 SCL Finals held in Fort-de-France, Martinique, and fourth overall for the 2012 SCL season. Radzikowski finished in fourth place at the 2013 Arnold Strongman Classic, his first appearance in the contest. Radzikowski has won 3 SCL contests so far in the 2013 season, the SCL Iceman Challenge IV in Finland, and in the Czech Republic and Portugal.[9] He is the current SCL overall leader for the season.
The Strongman Champions League is a strongman competition circuit, with several grand prix events throughout the year and the Strongman Champions League overall champion title going to the overall winner at the end of the season. The competitors include some of the top athletes in the sport, including Žydrūnas Savickas, Krzysztof Radzikowski, Travis Ortmayer, Nick Best, Mikhail Koklyaev, Ervin Katona, Andrus Murumets, Laurence Shahlaei, Vytautas Lalas and Terry Hollands. Initially in close partnership with IFSA, it quickly asserted its independence and has acted as a unifying force in the world of strength athletics, bringing together athletes from IFSA with those affiliated to the World's Strongest Man circuit, and having close cooperation with other major events such as Fortissimus. In 2012, SCL began co-promoting the new Arnold Strongman Classic-Europe contest which will become part of the annual SCL season of events.