well... that will be true for old system... but in the new system...you put him on every match + you have good regular training (need green pack)~ they still grow fast~ like i said ~ my 22 years old scout~ always reach to 8 star in the end of the season.... until 28 years old~ that is 6 season he did fast grow~ cause i put him on every single match.... and many of the match he got MOM.... which gain lots of %