An ejection, and the prop that was still open

It stands. An ejection is something that happened during a game the player took part in, and participation is the test rather than how the night ended.

The void conditions operators write are about a player not appearing. An ejection, a red card, a disqualification and an injury in the second minute are the same thing to that rule: the player appeared, so there is a number to settle against.

It runs the other way and is worth noticing: an under on an ejected player wins on the ejection, which is a real outcome nobody can price.

And that is the trap. 'Void if he does not play' gets read as 'void if something goes wrong', and the rule covers one thing only, which is absence.

What to do with it. When you take an over on a player in foul trouble or with a disciplinary record, price a short night as a loss rather than as a refund.