The short answer is "no." There have been no deaths among the Ultimate Fighting Championships contestants. However, there has never been a fatality in the UFC. And this is no doubt owing in part to the stringent safety procedures put in place to safeguard combatants. Menace McClain died during a professional wrestling match in Mississippi in 1999; he was 31 years old. If you look up "wrestling" on Wikipedia, they mention several other deaths during matches or training sessions. One pro wrestler died from a heart attack at the age of 42 and another from leukemia at the age of 16. There were also some cases of serious injury due to wrestling including two cases of concussion/brain damage and one case of knee ligament rupture. In addition, several people have died while performing as wrestlers for the WWE (World Wrestling Entertainment). They include: Roderick Strong (age 29), who died during a workout; and Evan Bourne (age 38), who died after suffering an acute cardiac arrest. Another wrestler, Matt Morgan, suffered two strokes while active on the roster and has not competed since 2013. Finally, there was a death during a professional wrestling match in Mississippi in 1999. The man who died was named Maze McNair-McClain. He was 31 years old.