Beanpoles like Tiger and Bonds can not get that kind of muscle mass on their frame without drugs, no matter how “hard” they work.
Either these guys are doing drugs, or they’ve cracked the genetic code and made one of the greatest breakthroughs in science. These guys need to let the world know how they’ve totally transformed their bodies and added all this mass without drugs. Millions of cancer and other patients wasting away need to know their secrets.
You should go to a medical school and look at the skeletons and see if you can pick out the ones that have a “NFL frame” and the ones with a “beanpole frame”. With a few exceptions we all have essentially the same skeletal “frame”.