I am trying to develop a player of mine “João José Augusto” really hard so i have been giving him playing time in official games on top of friendlies. I think he is already a decent player but his performance as a sub has been terrible. His stamina is high by the way.

He averaged below 4 rating the first 6 league games not scoring once and in 26 friendlies averaged 6.8 against weak reserve teams coming as a substitute at 55th minute.

Last league game he gets 90 mins gets 9.7 rating and scores a goal.

So basically i wonder why the player performance drops this much coming off the bench. Any ideas?

If his rating is less than 5 he definitely screwed up :D
When he plays the entire match he has more time to participate in the game and have higher ratings. As I mentioned in other topic, I’ve created an enhancement to better evaluate the player effectiveness in the match.