I watched a couple youtube rounds and tried to keep track of the putts:
So far I recorded a total of 248 putts:
151 made putts
97 missed putts.
So it is about a 60/40 ratio of made/missed putts (and that ratio never really changed)
In 2002 USDGC, I kept stats for the 16 players in the rounds I caddied. These were all pretty good players, whose scores ended up being 63-83 (and 67-77 other than 3 rounds).
On holes where they putted for birdie, the players made:
65/151 birdie putts (43% made)
81/86 par putts (94% made)
5/5 bogey putts (3-putts)
That's an overall putting percentage of
62.4%.
NOTE this includes
ALL putts where a putting motion was used,
whether it was 50+ feet or a drop-in, on holes where they putted for birdie.
(On holes where they DIDN'T putt for birdie, I didn't keep putting stats.)
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In 2005 I kept putting stats for 5 of my competitors in Charlotte Weekly Singles rounds. They made
67% of
all putts (including drop-ins). They 3-putted 1 time in 90 holes, and they shot 71, 75, 73, 71, 70, which are probably rounds in the 970-1000 range.
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In 2002 I tracked myself for 28 rounds on various Charlotte courses:
I made
44% of
putts between 10-30 feet.
I gacked 4 putts under 10 feet.
I made 10 putts over 30 feet.
I was probably shooting 930ish golf at that time, though my putting was far worse than my throwing.