13 Jennifer Lopez Pushed Trey Parker After the Oscars So, while no one truly knows who quit South Park for Hayes, it was most likely someone who was involved in the Scientology community, and not Hayes himself. Sources have indicated that the Scientology community had forced Hayes to go against South Park. According to his son, Hayes was perfectly fine with South Park and it had been someone else who had quit on his behalf. Hayes was incredibly sick and unable to take care of himself towards the end of his time on South Park. This actually ended up not being the case. Many believed that he had quit the show after becoming a Scientologist, insisting that Hayes was upset with how 'mean' the show was. He was an Oscar winner and talented musician who passed away shortly after leaving South Park. Issac Hayes voiced the character of Chef. What many fans might not know, however, is that the show mimicked what was happening in real life. The episode 'The Return of Chef' was all about how Chef had been manipulated into a club that changed him and took him away from his friends. It wasn't until the season premiere of season 10 that his absence was truly recognized, though. As the show went on, he gradually became less relevant. Chef was a major character throughout the first few seasons of South Park.
