Ive noticed some metal cleats, especially after rain (which we have had alot of), on the fields. I havent seen them too often, but it got me curious after the mitt thread. This is ASA slowpitch, if it really matters. Whats the census say here?
http://smilies.sofrayt.com/%5E/j0/type.gif

I'd probably check the ASA rule book, maybe Rule 3, Section 6, can't remember what article - to see what the book had to say.