Most Helpful Guy
They just change from one phase in life to another. They find someone they love and want to settle down, and commit themselves to do it. Being a player doesn't necessarily have to last forever. It can just be a phase they go through.
That being said, if you think you can capture a player, that is a huge mistake. Girls want to do this all the time and it's never a good idea. They think there is something special about themselves that make them better or more desirable than all the other thousands of women out there. They think that somehow they can tame his wild ways. They are just fooling themselves.
I'm not saying that's what you are doing, but if it is, forget about it. A player may settle down some day, or he may not. But if / when he does it will be on his own time and not before. I've known players who settled down, got married, and stayed married. I've also known players who had a roaming eye their entire life. They might have a girlfriend for a year or two, then as soon as someone else caught their eye they were gone.
Even if he "wants" to change doesn't mean he will. Wanting means nothing. Actually doing it is something else entirely. A current player is still a player. He will continue to be a player until AFTER he has already changed. Before then he is still a player.1
Most Helpful Girl
You can't change people. If they want to settle down its because the time is right for them.1