Does anyone know what specific font is used by Callaway Golf for their logo? link to logo- http://www.brandsoftheworld.com/search/?action=search&text=callaway

Well, John no conclusion by me. But being a logo it could have been modified or made by hand. Close ones for the blackletter font are Cloister black, Old English or Goudy text.
GOLF is either Futura or Avant Garde.

If you have time to search take a stroll here at the Old English-Department (have a look at a [modified] Humboldt Fraktur for example).

Or if you really have much time see Dieter Steffmanns site or even Manfred Klein for something like it.