Each season the x-numbered youths who you have promoted to the seniors for their academy season (season of destiny, if you will!) receive a star rating between 2 (weak) and 5 (super star).
The youth draw is done at around week 14 of the season. There will be the following ratings:
The youth academy player received the above number multiplied by the minutes he has played, and this is added to his main stat (up to a limit of 31.999 or 35.999 for a Keeper - more on this and the implications in the RULES page)
For example, if A_Player_x10 22 eng 1 19 12 8 34 200 500 500 500
is rated at 4* and plays 2120 minutes, the calculation is:
2120 x 4 = 8480 AB points. He would become as follows at EOS:
A_Player 23 eng 1 27 12 8 34 200 980 500 500
Of course you can allocate the ABs elsewhere but it isn't generally done unless the rating is either low, and you want to turn him into a utility player, or if he is an absolute freak and you have ABs left over!