LOS ANGELES: Steve Williams has seen plenty on the golf course but says he is almost lost for words when it comes to fellow Kiwi Lydia Ko's achievements.
Williams has caddied for Tiger Woods, Greg Norman, Raymond Floyd and now Adam Scott but admits the 15-year-old blows his mind.
Ko has already won NSW Open, Canadian Open and New Zealand Open titles, all as an amateur.
''I don't know Lydia at all but obviously I have followed her very closely and it really is hard to explain in words how good what she has already achieved is,'' Williams said from the US PGA Tour event in Los Angeles on Saturday.
''It's really hard to fathom. To be that good, that young, and that composed at that age is just incredible.''
Ko's feats have caused shockwaves in the US with Golf Channel moving to show the final round of the Australian Open live instead of on delay as originally planned.
Williams says he is not surprised.
''We're all talking about it out here,'' he said.
''The players are all talking about it, she's not flying under the radar but she's still so composed. What she has done is truly hard to put in words.
''She's playing against seasoned professionals and really good players and it's just astonishing.
''Golf Channel going live here in the US speaks volumes.
''They wouldn't change their programming under any normal circumstances.
''They obviously think something special could happen.''
Williams differs to Kiwi player Michael Campbell who suggested Ko hold off turning professional.
Williams will meet Ko's mentor Guy Wilson in the coming weeks.
He pointed out American Lexi Thompson and her special exception to join the tour at a young age.
''I would think someone like Lydia could only help the LPGA and help grow their game and their name,'' Williams said.
''There is no negative on going pro in my mind. There is nothing I can think of to suggest she shouldn't play the LPGA Tour. These days she could continue to study while playing - let's face it she already plays a schedule where she misses plenty of school.''