If he passed his HIA and has no symptoms between now and Saturday he is free to play as long as Leeds can demomstrate that he was fit to return to the pitch in the game if required.
We were10 points in front while he was having the HIA so arguably no need to bring him back on at that point tactically.
Not sure on the interchanges how many we actually used. If we exceeded the normal amount we might have an issue. The footage of him sat on the bench encouraging the team in play supports that he looked ok