Id heard that Williams was already fighting in MMA...anyway the guy was a average pro fighter at best I doubt he will be successful in K1. A championship caliber boxer might be able to augment their style to kickboxing and do well but not someone like williams. Boxing is a one dimensional combat sport, it may not seem like a huge difference but once you add the assortment of kicks(especially leg kicks) with knees and elbows most of the boxing stratigies that one has spent years making second nature are completely altered.