No it is not allowed.
No. A player who is substituted for cannot re-enter as a substitute.
Yes a player can be substituted at half time, as the ball is not in play.
Eidur Udjohnson substituted his father.
No the footballer can not come back once he is substituted.
5
No.
No.
No.
a player is allowed 6 fouls before "fouling out" in an NBA game.
No. Once a player is substituted for, they may not reenter.
No. Once a player has been substituted for, he cannot re-enter the game under any circumstances.