Seeing as though Sakuraba will be in attendance at UFC 60 tomorrow and seeing as though he's the only guy that's legitimately defeated Royce Gracie, wouldn't it make sense for them to mention them on the air?
Remember that Sakuraba is no longer with PRIDE and is with K-1 now. K-1 is in affiliation with the UFC so no harm can come of the UFC mentioning Saku on the air.
Plus, I'm sure Saku is only there because either the UFC invited him or because K-1 sent him. Saku likely doesn't give two shits about the UFC show itself.