Back to the MMA Newsfeed

The science of ‘Bones’: An in-depth look at Jon Jones’ drug-test findings, why he’ll be able to fight at UFC 232

LOS ANGELES — Out of all the talk of picograms, long-term metabolites and adverse findings, there was one pivotal thing that determined whether or not Jon Jones would fight this weekend.

California State Athletic Commission (CSAC) executive officer Andy Foster told MMA Fighting that, after reviewing multiple statements from scientists and experts, there was something that stood out above all the rest, swaying his choice to allow Jones to fight Alexander Gustafsson in the main event of UFC 232 on Saturday in Inglewood, Calif.

It was a single line from a letter written by Dr.