Not implying he is doping or anything but he went from being just another up and comer 10 flat 100 meter guy (5th in the 2016 Olympic Trials 100m) a couple years ago... to SMASHING the 20 year old 60m World Record. His body doesn't seem to have gained a huge amount of muscle or he hasn't hit a growth spurt. So what in such a short amount of time has allowed him to become pretty much the replacement to Usain Bolt in the sprints. People were saying Usain Bolt's record would not be touched in our lifetime but honestly Coleman could get pretty damn close.
Guess we will have to wait and see...