About progession one year to the next !

Hi everyone, first thanks a lot for this really good game ! I have a question about the progression of players from one year to the next: if we take the example of Jayden Daniels, I use the realistic roster updated of the playoffs. Here, he is having an excellent season, very good statistics, and he is still very young, so why does his stats drop by 4 points in Overall the following year?!? It doesn't seem logical to me at all. Is there an explanation? It only a random progression or does the game take into account the stats achieved to decide ?