As South Stags manager said, the biggest mistake that newer managers and simply a lot of managers in general make when trying to train is that they try to train their entire team or 6-8 players which is hard. That may be what you are doing. My max for trainees is and always has been three-four. One position training is the most efficient training and that is where you see these great young 20s players. I would say a level 3 trainer one position training is probably better than a level 5 trainer not one position training. For instance, this is my SF (Who was on the U21 USA NT last season), who I have one position trained since he was drafted and I have a level 4 trainer. 
Weekly salary: $ 26 906 
Role: rotation player
(BuzzerBeta) 
DMI: 185000 
Age: 22 
Height: 6'6" / 198 cm 
Potential: superstar 
Game Shape: respectable
Jump Shot: sensational	 Jump Range: respectable
Outside Def.: wondrous	 Handling: wondrous
Driving: marvelous	 Passing: sensational
Inside Shot: prominent	 Inside Def.: prolific
Rebounding: mediocre	 Shot Blocking: strong
Stamina: mediocre	 Free Throw: average
 	  
Experience: inept
The 26 year old that you posted has 109 skill points. Edju Palmer has the same number of skill points and is 4 years younger. There are no better draftees for higher leagues or anything, it is jsut flat out good training by a lot of managers who one position train with a level 4+ trainer and then you can get players like that. 
If you look on the U21 NT right now, you'll notice a PF named Devin Farnsworth, and he is the best player I have seen IN A LONG TIME. He is currently at 112 skill points and is only 21 years old. This is because his manager has a level 7 trainer and one position trains him every week. 
Last edited by E.B.W. at 6/24/2014 1:07:02 AM
                                
                                
                                
                                
                                
                                
                                    Murray/Harris/MPJ/Grant/Jokic - 2020 NBA Champs