In case he got a hole in one.
Tiger Woods hasn't hit as many balls.
In case he gets a hole in one.
If it's red on top, fire in the hole.
A paracetamole!
In case you get a hole-in-one (stolen from some girl at school)
A: Because they're both steaming and wet when you enter and they don't mind if you bring friends.
If she's only wearing one sock. (This joke brought to you courtesy the homeless guy outside my local 7-11.) Edit: tweaked the punchline.
In case you get a hole in one.
In case he got a hole in one! Ha Ha Ha Ha