Francis is a big boy, so give him some time to build some kind of tank. We have to be patient. It took Hurls 5 years to get to AA level. ( I reckon he got to that level about halfway through the 2014 season.)
And he's a growing boy which sine pointed out previously, I would also hope that things like Glandular fever and the like have been eliminated for his lack of endurance. Would hate to see him pushed into chronic fatigue. But hopefully totally jumping at shadows there.
The upside is that if he is growing still and is as talented as indicated, we could have stolen the best KP in the draft with a bit of luck.
So I'm with you Chris, just give the boy time and let him "grow" into his potential and start pushing when his body is ready for it.
How does one get pushed into chronic fatigue?
I am sure the kid will be fine, he is in the correct environment, with good doctors and sports specialists around him. Not something we should be worrying about.
In saying this and in answer to your question.
Its a very real possibility, what Scarey is saying has Merret. His a kid, still growing, and has gone through a hell of a lot of over the past year especially with his brother. I have been battling chronic fatigue for 5 years, let me tell you it is not pretty.
Most people who get it, have pushed the limits too hard and for too long, often (but no always) there is an underlying condition that they where not aware of. Glandular fever for example as Scarey said.
Having it myself I have talked to many people with the condition. Every case is different, but there is one thing we all have in common. We where all highly motivated, highly driven, and basically burnt ourself's out to the point where it takes years if ever (in some cases), for our body's to fully recover.
Usually an underlying condition, combined with high stress, (both physical and mental) are at the root of the cause.