I keep telling you we aren't even talking about the same thing anymore. I'm not really sure how to make it clearer. I'll make a FINAL attempt at this. I am referring to growth spurt due to puberty which ends in males around 18-19 years of age. It can be a earlier depending on the male or slightly later as well. I'm not gonna bother linking a resource just google this, but it seems you have no problem with that point.
I am so obviously NOT saying that males peak physically/athletically at 19, considering we are discussing youth, it should be obvious that I am not saying that we should wait until they are in their mid 20s to give them a chance.
You are a good example, you said you were getting faster and stronger through your 20s yes? Well my claim is this: Did this happen naturally to you or did you exercise as this happened? Because during puberty we all get taller, faster and stronger. But you likely exercised to pack on muscle mass in your 20s (which is smart).
Now in reference to my initial post, Diaz may be finished puberty (I'm just guessing he hasn't and has more room to fill), but he should obviously pack on muscle as his career continues. Look at Messi for example, I can't remember where I read it, but he said he had to pack on more muscle when he was around 18 to compete with the adults, and he did. And look at Messi say around 19-20 and him now, there isn't much of a difference physically, maybe he added more muscle as the years passed but that's about it.
