Manipulated Save Percentage - and how it applies to Sawchuk, Hall and especially Brodeur - Part II
Let me start by posting the table from the end of part 1:
Ken Dryden | 0.9338 |
Dominik Hasek | 0.9319 |
Tony Esposito | 0.9292 |
Patrick Roy | 0.9291 |
Bernie Parent | 0.9264 |
Martin Brodeur after adjustments | 0.9231 |
Glenn Resch | 0.9229 |
John Vanbiesbrouck | 0.922 |
Jacques Plante | 0.9209 |
Johnny Bower | 0.92 |
Ed Belfour | 0.9199 |
Roberto Luongo | 0.9196 |
Dan Bouchard | 0.9194 |
Real life Martin Brodeur | 0.9191 |
Glenn Hall | 0.9188 |
Tom Barrasso | 0.9186 |
Curtis Joseph | 0.9184 |
Tomas Vokoun | 0.9178 |
Henrik Lundqvist | 0.9175 |
Rogie Vachon | 0.9168 |
Sean Burke | 0.9167 |
Kelly Hrudey | 0.9167 |
Andy Moog | 0.9166 |
Terry Sawchuk | 0.9033 |
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This table contains the top-23 all-time in peak adjusted save percentage, plus Terry Sawchuk, and a fairly adjusted Martin Brodeur.
But I'm just getting started!
Take a look at numbers 1, 3, 5, and 7 on this list - all 1970s goalies. Watered down talent pool thanks to the WHA and fast expansion. Sure, they were great goalies, but comparing them to the league average save percentage really overstates their greatness.
Then, take a look at 9, 10, 15, and... I don't know, 155? Plante, Bower, Hall and Sawchuk were the best statistical goalies of their time but none of them can top the adjusted results of the 1970s goalies. They had to compete against a league average that was usually a HHOF goalie like Worsley, Sawchuk, or Lumley - that's not fair or right. Now I know HO had a system and it's completely sound mathematically and I respect things like that, but anyone who has known me long enough knows I am a fan of fudging and manipulating numbers subjectively to help them "look" right, and this is a case where that is necessary.
First of all,
poor Terry Sawchuk. He's taking a kicking in this discussion, and maybe rightfully so, but his peak was hella dominant, and the save percentage era doesn't cover any of that. His first five seasons are probably his best five, and none of them are counted here because they predate regular season save percentage - also, one Jacques Plante season is missing. If I could just find a way to simulate save percentage for five seasons, then the entire careers of two top-6 goalies of all-time would be covered....
...so I did that. This is by no means an exact science, but there is enough information to use to make educated guesses. The NHL of 1950-55 was very similar to the NHL of 1956-60. We had a situation where one team was the best, and they also had the consensus best goalie. We can be certain that he had a very dominant save percentage, but also certain that his dominant team was surrendering fewer shots than the league average. And the total number of league goals was quite consistent from 1950 right through 1957, so you can expect that the total shots taken would have been as well. As it turned out, while I was manipulating the figures, I had to walk a fine line between making the league's SOG/60 averages abnormally low, and pumping up the league's average sv% to abnormally high figures. I ended up with league average save percentages of 91.01, 91.38, 91.84, 91.76, and 91.44.
I then assigned Sawchuk a workload in each season similar to what Jacques Plante, starter on the most dominant team from 1956-1960 had, and from there gave him save percentages of .9266, .9293, .9300, .9295, and .9298. I believe this is consistent with a goalie who would win the 1st or 2nd all-star team spot in each of these seasons. This was also quite conservative, because out of all pre-expansion 50-game seasons, these were just the 11th, 14th, 17th, 25th and 26th best seasons posted by any goalie. Then again, Plante had 5 in that range, Hall had 7, Bower had 4 and Worsley had 3 (and Giacomin and Hodge one apiece), so that seems fair. Still, I'm revisiting this, because intuitively, Sawchuk was thought to have the best peak of the era... doesn't mean he needs to put up all of the best five seasons ever, but his best placing higher than 11th would be a start.
(ten minutes later)... took a look at those seasons and noticed that scoring was 10% higher in 56-60 than it was in 51-55, so since I have no idea if it was because goalies were stopping more shots, or there were fewer shots, I manipulated shot totals to the point where they were 50% responsible, and save percentages accounted for the rest.
As you can imagine, this did wonders for Sawchuk's adjusted save percentage. I'd show you, but that was an intermediate step and I didn't save that step like I did for Brodeur.
The next major manipulation I did, was to subjectively change the "league average" save percentages every season to better reflect the competition level among goalies. I didn't go by any special formula, I simply went case-by-case.
In 1951-1955, I bumped the average down similar to how I did in 1956-1967 (see below)
In 1956-1967,
I bumped the league average down to be approximately in-between the lowest starting goalie and the 2nd-lowest. This is done so that adjusted SP now shows how a goalie compared to the 5th-6th best goalie, instead of the 3rd-4th (which makes a world of difference)
In 1968-1972, I did nothing. There were 12 teams and a platoon system, so plenty of decent goalies with only one major league to play in. The league was not watered down. (Competition level by division is an issue, but adjusting for that would likely be a nightmare)
In 1973-1979,
I bumped the league average up to be approximately 1/3 of the way up the list instead of right in the middle. The league expanded too quickly, and the best WHA goalies could have played in the NHL, keeping the really bad ones (who hurt the league average) out of games. Goalies compared to this horrible league average look
too good.
In 1980-2018, I did nothing. There have been 21-31 teams, the NHL was again the only top pro league, and if you want to say it was watered down in the first half of the 80's, I wouldn't disagree, but it was nothing compared to the mid-late 70s. In 1985, in theory the worst goalie in the league was the 42nd best in north america. In 1977, the 60th best north american goalie could get playing time in the NHL.
This had the effect of making Plante, Hall, Sawchuk and Bower look better - and it should. They were not that dominant compared to the league average, only because the league average was an impossibly high standard. It also had the effect of making Dryden, Espo, Resch, Parent and Vachon look worse - and again, it should. They tore apart a severely weakened NHL with a league average baseline influenced by some truly terrible goalies.
(in the meantime I managed to make it so that Sawchuk had the 5th, 9th, 20th, and 25th best seasons posted by any goalie before the lockout, better appreciating his early peak while still being conservative).
After all that, here is what I got:
Dominik Hasek | 0.9319 |
Jacques Plante | 0.9303 |
Johnny Bower | 0.9294 |
Patrick Roy | 0.9291 |
Ken Dryden | 0.9284 |
Glenn Hall | 0.9283 |
Tony Esposito | 0.9262 |
Terry Sawchuk after Adjustments | 0.9257 |
Bernie Parent | 0.9234 |
Martin Brodeur after adjustments | 0.9231 |
John Vanbiesbrouck | 0.922 |
Glenn Resch | 0.9203 |
Ed Belfour | 0.9199 |
Roberto Luongo | 0.9196 |
Dan Bouchard | 0.9194 |
Real life Martin Brodeur | 0.9191 |
Tom Barrasso | 0.9186 |
Curtis Joseph | 0.9184 |
Tomas Vokoun | 0.9178 |
Henrik Lundqvist | 0.9175 |
Sean Burke | 0.9167 |
Kelly Hrudey | 0.9167 |
Andy Moog | 0.9166 |
Rogie Vachon | 0.9128 |
Real life Terry Sawchuk | 0.9033 |
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Note that the modern goalies show up at 1, 4, 10, 11. The pre-expansion guys are at 2, 3, 6, and 8. The 70s guys are 5, 7, 9, 12. I think that after these adustments that reflect how difficult their benchmarks were to hit, the fact that they are sprinked among the top-12 with a fairly even distribution tells us that this manipulated adjusted save percentage does
treat all goalies equally, by not treating their eras as equal.
This is completely subjective. But you must agree that when Gump Worsley and Terry Sawchuk are league average goalies, that's not the same as when Wayne Stephenson and Doug Favell are league average.
Except in the case of Johnny Bower (for whom something funny might have been going on), I think the above list does a fair job of ranking these goalies by their peaks. Considering longevity and consistency, I have no problem with putting Brodeur ahead of Parent, Sawchuk and Dryden (and of course, Bower), but for where they all look as peak performers, I like it.