I used to play in cleats but after 3 knee surgeries I decided that was a bad idea. Now I play in very lightweight trail running shoes. If I slip a little I just remember that it's better than sticking in one place and over torquing your knee.
These are the current ones that I'm using now. The only bad thing about them is that they don't hold up very well on concrete. I will probably only get about 9 months out of them. The cool thing about them is that they're so light it almost feels like you're not wearing anthing at all. They're the most comfortable shoes I've ever put on.
http://www.newbalance.com/outdoor/trail/MR790/