yes. if you are in a building team stage and planning to sell your crop of trainees once or twice before really trying to get promoted like I did in hattrick, the guy with high(est) potentials that are too tall for their position might should be avoided. but you could sell all your other trainees and keep your super potential guy and keep training him. I am not planning to get promoted for another few years and don't take much care for the league and results, that way I can train 6 trainees a week... Enough players to sell.