How do I ask him for a date?

There is this guy I’m interested in that’s on my soccer team. I don’t really know him that well, I can just chit chat a little bit with him after soccer practice but I want to get to know him better.

I have his Facebook page and his msn and phone number are there. I don’t want to call him or send him messages online because it looks too stalker-ish. The only time I have to see him in person is at these practices so I’ve considered sending him Facebook mail but I’m afraid it will come out as too silly/obvious.

Does anyone know of a good way to introduce myself and ask him out?