Buying good players?? - what's my mistake??

[nikolgiorgos]

example no2
I bought this nordgen, first day of this season



after a couple of trainings (test) and a participation in the first (cup) game (also test), I started power-training and gathered (not exactly, was given asap) 50 sp for "defensive wall" sa - about 50 3bars/practice, spending about 60 greens.
After that, I continued power training, to give him about another 60 sp, to quality this time. So, from 82q now is 86q (having a new name )

In this period of 12 days, I used him only in 6 of the 22 games. (Was lucky he didn't have an injury yet ).
Now, I 'm satisfied and from tomorrow I 'm gonna start using him in games, without power training him anymore for this season.
Till the end of the season, he 's gonna earn about 20-30sp (from participation in the games and normal training). I 'm ok with that.
If I was using him in more games (half or more), then probably he would have an injury.
Then I had to heal him with reds because you can't have your nordgen out for 5 or more days. Maybe got injured again and also possible he would performing bad.
Next season (actually till 21 y.o.) he 'll not gonna need so much power training because he has already the sa and he is near to 6*.
So no power training, no need to rotate.