I heard of a dirty but effective boxing technique called the "louisville slugger." I doubt you could sneak a baseball bat into a ring. Can anybody explain what this is? Are there pix or video? Is it legal in MMA?
The google says
Louisville Slugger Men's TPX Boxer Shorts with XPS Flex Cup
http://www.baseballexpress.com/catalog/product.jsp?productId=86239
Best i can find