In my NERP formulas, I scored 1 Clutch hit per side (2x weight for vs R, 1x weight for vs L) as 0.16 NERP. That seems way to high, which is fairly predictable.
I don't have my notes in front of me of why that much. 1 "SI" on a diamonddope card (so SI in the #2 row, 1 outcome per 108 PAs) scores 0.568 NERP. Giving about 28% (0.16 NERP) as much for a clutch SI seems too much.
Here are basic numbers. Can't we figure out the % of PAs that would occur in "clutch" situation? ---> 2 outs with runner(s) in scoring position? Chat GPT roughly states "historically, around 20-25% of plate appearances in Major League Baseball occur with two outs and one or more runners in scoring position." -------> this is laughably high.
BBref has League Splits by year.
https://www.baseball-reference.com/leag ... &year=1996 % of PAs that occured with 2 outs, RISPFrom 2014-2013: 11.45% --- (all PAs = 0.250/0.319/0.412)
From 1996-2001: 12.50% --- (all PAs = 0.268/0.339/0.427
Interestingly, every year in the 16-year sample shows "clutch" OPS being about 15 to 20 points lower. ONLY 2021 shows better #s in 2 outs and its by a tiny amount. 2021 RISP: 0.712 vs 0.707 overall.
Going from +16 clutch to -16 clutch can be calculated as a percentage of those 108 PAs on one side of a hitters card. This is about the whole range of clutch hitters.
+/-16 clutch = 14.8%
+/-15 clutch = 13.9%
+/-14 clutch = 13.0%
+/-13 clutch = 12.0%
+/-12 clutch = 11.1%
+/-11 clutch = 10.2%
+/-10 clutch = 9.3%
+/- 9 clutch = 8.3%
+/- 8 clutch = 7.4%
+/- 7 clutch = 6.5%
+/- 6 clutch = 5.6%
+/- 5 clutch = 4.6%
+/- 4 clutch = 3.7%
+/- 3 clutch = 2.8%
+/- 2 clutch = 1.9%
+/- 1 clutch = 0.9%
+/- 0 clutch = 0.0%
Crossing that with hypothetical %s of "Clutch" PAs, regardless of the batters "clutch" symbols, gives us a matrix of %s for each clutch rating by ~"Clutch PA %"
Here's a basic outline for a few clutch ratings. This is % of PAs on the HITTER's card that
should be clutch symbols. It's just the % of the card that is clutch symbols x the percentage of all PAs that should be "clutch" situations. Yes, half this many PAs would be "clutch" eligible because the pitcher cards (1/2 of PAs) don't have clutch symbols. Still for finding NERP, we're looking at just on the hitters' 108 PAs. Right?
+/- 10 clutch @ 11% Clutch PAs = 1.02%
+/- 10 clutch @ 12% Clutch PAs = 1.11%
+/- 10 clutch @ 13% Clutch PAs = 1.20% --- This is 1.29 SI on the card for 10clutch, which is 0.07 NERP per $ symbol?
+/- 10 clutch @ 14% Clutch PAs = 1.30%
+/- 10 clutch @ 24% Clutch PAs = 2.22%
+/- 10 clutch @ 25% Clutch PAs = 2.31%
+/- 10 clutch @ 26% Clutch PAs = 2.41%
+/- 10 clutch @ 27% Clutch PAs = 2.50%
I think this is right? Originally I was looking at 20%+ "clutch" situations, but 11-12% has been the MLB range.
So, what's the % of PAs in ATG that occur with 2 outs and runner in scoring position? I think it'd be higher with the high OBPs, XBH, runs and SB #s in many league? 12.7% in MLB 1999 and 2000 when league OPS was .778 and .782 respectively ---- the highest OPSs ever. So 13-14%? That shows 0.072 NERP per $ symbol if they're valued exactly as a single. That's less than half of my previous 0.16 NERP value. Some "contextual" benefit (clutch hits = runs scored, so wins or at least more RBI stats which we love stats!) So what % of a normal SI should a clutch SI be worth? 1.5x? That'd get it to 0.108 NERP which is closer (2/3rds) of my original 0.16 NERP? ----- Will adjust I think
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