Caddies at Royal County Down don't do anything with the flagstick until you ask. My caddie says that anything outside of 10 feet he recommends leaving it in. He was a former pro golfer and worked at some resorts afterwards in South Carolina. I took his advice as I typically need caddie advice often.)
We've conducted more tests (and will be releasing the results at the end of June or early July), very precise, measuring ball speed so that we can correlate that to "feet by" on any green speed, and our recommendation remains:
- For putts where you're confident you'll control the distance to within three feet past the hole or less, take the flagstick out.
- For putts where the flagstick leans so much the ball won't fit from your angle or where it's so windy the flagstick is rattling around in the hole (at ground height), take it out. These two situations are very, very rare.
- For all other putts, the flagstick will help you overall. It may happen only once or twice per season, but it may also help you three times per round, too.