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Originally Posted by Nchabazam
Correct me if I'm wrong, but aren't all SG stats measured against multiple years worth of data from all events? If it's just against past rounds at Torrey, it would make it more relevant.
I think it's a good stat in general, but definitely lacks nuance since it can't really say how bad missing it in the rough on certain holes is, nor at certain courses. Consistently hitting balls deep into the rough at Torrey is going to be worse than hitting it in the "rough" at the course they play before the masters in Houston (too lazy to look up the name of the course). At Torrey, you can't get it close to almost any pins from the rough because of how severe the greens are, and how thick the rough is.
You are partially correct. SG/rd is calculated by taking each player vs the baselines(that are created from years of data) and then adjusting the entire field to get the overall average back to 0.
Ie its pretty likely Tiger was losing SG off the tee vs the baselines bc Torrey is a much more demanding driving track however he was losing less than the field was vs the baselines so he ends up with a positive for the week.
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Seems like pounding it 320 on the fly into the rough on every hole at the US open might net you a positive SG off the tee, but will completely destroy any chance you have at making the cut. That's the nuance it seems to be lacking here. Pounding it 320 into the rough at Augusta, or even the pine straw, isn't going to kill you since the rough is short, and there's a lot of room for foul balls.
You seem to be missing the "nuance" of how SG works. If you hit a bunch of tee shots that destroy your chance of making the cut then you aren't gaining shots off the tee. To gain a shot off the tee you have to be in a better position relative to the field compared to where you were when you were standing on the tee.
It works by taking how many shots it takes the average tour pro to hole out from where your shot starts, then looking at how often it takes the average tour pro to hole out from where your shot finishes.
Ie on a typical 450 yd par 4 it takes the average tour pro 4.13 shots to hole out. If you hit a drive into the rough and leave yourself with 120 yd the average tour pro is going to hole out from there in 3.08 shots.
So 4.13(start) - 3.08(finish) - 1(shot it took you to get from A to B) = .05 shots gained
The situation you are describing in a US Open cannot exist. In a US Open all of the above baselines would likely receive a huge bump in difficulty. So a 450 yd par 4 may now average 4.3 shots. And due to the penal nature of the rough, it may take the average tour pro 3.5 shots to hole out from 120 yds in the rough. The new calculation would be
4.35(start) - 3.5(finish) - 1(shot it took you to get from A to B) = .15 shots lost
I see what you are saying, you're saying just take that +.05 from the baseline every time at the US Open and voila you are gaining massive strokes. I believe the way the tour adjusts the data fixes this in the above fashion. Otherwise what would happen is if you think Tiger's driving was super inflated at Torrey then his SG APP must be way under represented. There is no doubt about how many total shots he gained vs the field for the week, how they are divided up can be a bit tricky.
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Once again, if it's somehow based on data at the specific venue (which I don't see how that would be the case), then it says more. But otherwise it's definitely kind of a "dumb" stat, that has a lot more value over the course of 20+ events than at one specific tournament.
Definitely wouldn't call it a "dumb" stat. It's not perfect but it is infinitely better than relying on fairways hit.
Last edited by NxtWrldChamp; 01-31-2018 at 06:26 PM.