MMA fighter Isaac Johnson has died at the age of 31, following a collapse during a match in Chicago. The incident occurred on Friday, November 22, at the Matador Fighter Challenge held at Cicero Stadium. Johnson collapsed towards the end of his fight and was rushed to hospital at approximately 8:38pm. Despite the efforts of medical staff, he was pronounced dead at 12:01am. The police are now conducting a death investigation, and an autopsy has been scheduled to determine the cause of death. The event was promoted as “the ultimate MMA and Thai event, where local warriors will battle it out in high-stakes, high-intensity matches.” Joe Goyita, the event's promoter, expressed his sorrow on Facebook, stating, "This is a post I hoped to never make. Last night, one of the fighters in our event, Isaac Johnson, collapsed towards the end of his fight. Medical attention was given by medical staff on hand, and he was transported to hospital. I was then informed at around 1:30am this morning that he didn't make it. I don't have the words to express how I feel right now; all I can say is my deepest condolences to his family, friends, and teammates. We will know more as the medical report is released." Johnson was scheduled to fight Corey Newell in a Heavyweight Thai match during the event. As of now, no further details regarding the cause of his death have been disclosed. Updates on this developing story will be provided as more information becomes available.