Seems like there's a lot of experimenting going on with unconventional putting grips. As long as there are golf pros there will be golf pros trying odd things to fix their putting. I have not seen how Hal has done yet today. Hal certainly has a chance to play well. Last year he was one of the few using these type of balls.
Tiger plays a similar ball made by a different manufacturer.
They are doing wonderful things with new golf balls and I think the process will only become more refined. All four trophies would be in his house at the same time. That seems like a high number to me. Considering the fact that the wind is not up. After you hit it in the water once, it is kind of difficult to throw down another from the same place.