Sell him. I have a 18yr old DMR/MR. He couldnt get a rating above 7 no matter what ( Average was 5 ). Prime example was an 11-0 thrasing in which he got a hatrick and 4 assits, and got a rating of 7. The other 10 people all got 8-9 rating. That player scored a fair few goals for me, but i eventually sold him because in the games id need him to play well he didnt, some games he was getting rated 4. Got 1.5m for him, bought a new player, who so far has not gotten below a 8.