Can you intentionally reduce player quality?

[飞天雪地]

5 or 6 or 7* stars-quality doesn't matter.
it's the number (how much close he is from the next star).
A 5* player with 38 q is more attractive than a 6* player 40 q and less attractive than a 4* player with 34 q.

Thanks for the tips nic! I have a couple of 4 star players at 79% but I still need them so they are not auctioned yet. So I figured that to stop them from becoming unattractive 80% 5 star players I could just train them into a new position, but I am wondering if that would show on the player info when I put them on the market? Obviously no one would want to buy a player who is at say 5/50 of training for a new position