Can I take back a tile I already discarded?
No. A discard is committed the instant you finish naming it aloud or the instant it touches the table, whichever happens first. After that it cannot return to your rack, and it cannot be used for a Joker exchange. One narrow exception exists, and it lives on the very first turn of the hand.
Answered by Prim. Last reviewed 2026-09-21.
Down is down, and there are two ways to get there
Two separate things commit you, and either one alone is enough. The first is your voice. Finish the name of the tile and the tile is thrown, even if it is still in your fingers and still a foot above the table. The second is contact. Let the tile touch the table and it is thrown, even if you never said a word. Whichever of the two happens first is the moment that counts.
Players are often surprised that speech alone does it. It feels as though nothing has happened while the tile is still in your hand. But the table has heard you, three other players have already begun deciding whether they want it, and the rule protects that. You cannot unring the bell by holding on.
A partial name is not a commitment
There is real room here, and it is worth knowing honestly. A name that is not finished does not commit you. Begin to say a tile, stop yourself partway, and you may still keep it. That is not a loophole, it is the rule as written, and every table plays it.
What it should not become is a habit. A player who starts and abandons half her discards is broadcasting hesitation to everyone, and doing it repeatedly slows the table. Think first, then speak once. The rule gives you the half second, not the whole minute.
The one exception, and it is small
At the very start of play, a player other than East who discards before drawing may take that discard back. Only then, only on that first turn, and only for that mistake. It exists because a player used to a different table habit may throw before picking without realizing the hand has not reached her properly yet, and the League would rather fix it than kill a hand on the opening turn.
After that first turn the mercy runs out. Discard before drawing later in the hand and you are left holding twelve tiles, which is a wrong count, and a wrong count is a dead hand.
What this means for your Jokers
This is where the rule costs people the most. A tile that has been fully named or has touched the table can never be used for a Joker exchange. If you are holding the natural tile that a Joker is standing in for somewhere on the table, make the exchange first, then discard. Do it in the other order and the Joker stays where it is and your natural tile is gone for nothing.
The same is true of a tile called from the center. A discard you claim may be used to build an exposure or to declare Mahjong, and never to trade for a Joker.
Why the rule is this strict
Information is the currency of this game. The instant a tile is named, everyone at the table knows something they did not know a moment ago, and several of them have already changed their thinking. Letting a player retrieve it would let her test the room and then withdraw the question, which is exactly the advantage the rule refuses to hand anyone.
So the discipline is simple, if not always easy. Decide before you speak. Once it is said, it belongs to the table.
Prim's Own
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