Sorry, but I beg to differ with you Tex. I will agree that Darren does not "owe" anyone anything. But that does not mean he doesn't have any moral responsibility to make things right with them in some way. Just to say "I'm Sorry" doesn't really cut it here.
Among real gamblers there is a moral code, that allows them to loan money on a hand shake. Their word is their bond! And they know when they are wrong and need to do something to right it. In this instance Darren pretty obviously screwed up and it was potentially very costly to someone else besides just himself. This is not about a missed ball or anything like that, so please save that conversation for someone else. Missing a match is very different than missing a ball! Plus Darren was already guaranteed money back in the tournament, so he didn't come up empty, like the guys who bought him in the Calcutta. He was in position to offer them something.
The OP is a class act who doesn't whine about his losses and I respect him for that. Is he happy about what happened? Obviously not. He feels let down by Darren and well he should. Will Darren reach out to him I don't know. It's on his conscience, that's for sure. Stuff like this you don't just sweep under the rug and say tough luck. If you're a man you try to make it right somehow. And that somehow should include more than just an apology.
I know Darren will read this and be unhappy with me because I'm not the one involved. But if he (or anyone else) asked me what I think I will tell them. And I did right here!