3. Goalie Talent Pool
We should think in a serious way about the depth of talent pools, sources of talent, and how that has impacted goaltending over the years.
Here's how the number of goalies in the league hitting various games played cutoffs and the percentage of them that were born in Canada changed over time (picking years ending in 9 rather than a nice round 0, just because that gives us Dryden's last season, a Roy peak season, a Hasek peak season, and just misses Brodeur's last Vezina):
Year | 1979 | 1979 | 1989 | 1989 | 1999 | 1999 | 2009 | 2009 |
Games Played | All | Canada | All | Canada | All | Canada | All | Canada |
>=1 GP | 50 | 49 | 68 | 59 | 85 | 62 | 89 | 43 |
20+ GP | 32 | 32 | 35 | 41 | 46 | 29 | 53 | 25 |
40+ GP | 14 | 14 | 20 | 16 | 25 | 12 | 33 | 15 |
Converting everything to percentages:
| 1979 | 1989 | 1999 | 2009 |
Games Played | % Canadian | % Canadian | % Canadian | % Canadian |
>=1 GP | 98% | 87% | 73% | 48% |
20+ GP | 100% | 85% | 63% | 47% |
40+ GP | 100% | 80% | 48% | 45% |
I think the competitive environment changed a whole lot over those 40 years, and the international goalie talent pool in particular exploded. I tried to adjust for this in putting together my list, but I think if anything I didn't go heavy enough on modern guys. This is one of the reasons why Ken Dryden didn't make the top 8 on my initial list for this project, and why I continue to argue that Hasek had the best peak in goaltending history. It is also why you should be very careful with comparing league averages across time.
I think the current terrible state of Canadian goaltending is also an interesting point to consider. Canadian goalies have combined for one Vezina third-place vote in the last three seasons combined, but if there were only Canadian goalies in the league, one of them would be winning the Vezina. I think it also shows that talent pools can swing pretty widely, especially if we're only looking at the top end at one fairly niche position like goaltending (and for much of history, it was also mostly one country supplying all the relevant talent).
4. Coaching Effects
One factor that I'm really focusing on this time around is coaching. I'm looking at the career defensive stats for coaches to try to determine which ones had the largest impact on their netminders' success, and using that as part of my estimate of the team effects on each goalie's numbers.
It's also interesting to note goalies who had standout success for one coach vs. many. Obviously everyone in this round was elite for the vast majority of their careers, but not all of them were able to win awards for multiple coaches. For example, here's the current pool (Tretiak excluded) with the number of different coaches they have had for a 1AST team (pre-1982) or Vezina (post-1982) season:
Glenn Hall (4): Jimmy Skinner, Rudy Pilous*, Billy Reay, Scotty Bowman
Dominik Hasek (3): John Muckler, Ted Nolan, Lindy Ruff
Martin Brodeur (3): Pat Burns, Jacques Lemaire, Brent Sutter
Ken Dryden (1): Scotty Bowman
Patrick Roy (1): Pat Burns
Terry Sawchuk (1): Tommy Ivan
Jacques Plante (1): Toe Blake
(*-Hall had the 1957-58 season that was split between Pilous and Tommy Ivan, but I'm only counting the coach with the most games in each season for simplicity's sake)
The top three on that list had success in a few different coaching environments, although Hall was the only one to accomplish this for different franchises (and he impressively did it for 3 of them). Everybody knows about Sawchuk's five-year peak which came in one consistent coaching environment, while Dryden and Plante both had one coach for almost their entire tenures in Montreal. Roy is the one that really stands out here, given that he had Pat Burns for only 4 of his 19 seasons, but those 4 years accounted for all 3 of his Vezinas and one of his Vezina runner-up finishes, while he went 2-3-3-4-5-5 in Vezina voting over the rest of his career. Which raises the obvious question, how much of that great 1989-1992 run was Roy peaking, and how much of it was Burns?
Similarly, how many of these guys faced coaching situations which might have negatively impacted their stats, awards, or team success? For this round, I'm particularly interested in trying to get a good defensive estimate for Sawchuk's Boston and Detroit 2.0 years.