Ultimate Fighting Championship controversies
The American-based Ultimate Fighting Championship (UFC) is the largest mixed martial arts (MMA) promotion in the world. Since its inception in 1993, the UFC has been the subject of controversies, ranging from moral condemnation of its events by politicians, which resulted in MMA being banned in many US states during the late 90's to mid 2010's, to criticism for underpaying its athletes and for criminal behavior committed by its fighters.
Source: Wikipedia — Ultimate Fighting Championship controversies (CC BY-SA 4.0)