Im not aware of ANY deaths in sanctioned MMA. Im sure at some point there will be but I dont this there will be one in the UFC.
The possibility is of course always there but the probability is fairly low. If it was even near as probable as you claim we would have seen many more deaths in smaller organizations but we dont.
I know of one death in all of MMA and that was a wile ago and outside of the U.S. not that there could not be more but the point is that its so rare its really a non issue and with the regulations and rules in the UFC I dont see it happening in that organization.
Will it happen in MMA again? Im sure it will, will it be in the UFC highly unlikely.
There have been three deaths in MMA. Only one in a regulated, sanctioned event.All three were very sad cases. The first was Douglas Dedge who died in 1998. He was fighting in the Ukraine and had some extraordinary health issues prior to the fight that he concealed from promoters. This was an unsanctioned fight.
The second was in 2005, a fighter named Lee was fighting at an unsanctioned show in South Korea. Fairly little is known about the circimustances.
The third was Sam Vasquez in 2007 in Texas, this is the only one in a sanctioned bout. My understanding is that Sam was knocked out during training and failed to disclose this to the commission. Sam was a nice guy and its a real shame!
Is it inevitable that there be a serious injury in the UFC? Yes, we've seen a few already. Cory Hill as an example. I believe the greatest risk that professional fighters in general and UFC fighters in particular face are related to weight cutting. Fortunately the commission's doctors do a good job on fighter's physicals and will put the stop to any fight where the fighter is too far gone.
The reality is MMA is statistically safer than the majority of contact sports. You want to see some scary statistics? Look at cheerleading!! There are two reasons why MMA is as safe as it is: The rules and the referees. The rules have been created to make as fair and safe of an environment for the fighters. Next time you criticize a ref for an early stoppage remember this - that referee has two fighters' lives in his hand and his judgment can mean the difference of life and death. The difference between life and death being one punch.