Complex sentence: A professional MMA competitor since 2008, Held has competed frequently in his home country of Poland and is highly touted by the media, often being regarded as "the prodigy of Polish MMA".
Split into simpler sentences: A professional MMA competitor since 2008, Held has competed frequently in his home country of Poland and is highly touted by the media. In his home country, he is regarded as "the prodigy of Polish MMA".