Great Stuff Djoker on the expected titles based on betting odds!

Just to get things in the same format as F4p, here are the rankings of the players you listed, updated through 2023:
Delta (by SRS): Difference between Expected Titles (by SRS) and Titles
Delta Percentage (by SRS): Percentage Difference between Expected Titles (by SRS) and Titles
Delta (by Preseason Odds): Difference between Expected Titles (by Preseason Odds) and Titles
Delta Percentage(by Preseason Odds): Percentage Difference between Expected Titles (by Preseason Odds) and Titles
Delta (by Postseason Odds): Difference between Expected Titles (by Postseason Odds) and Titles
Delta Percentage(by Postseason Odds): Percentage Difference between Expected Titles (by Postseason Odds) and Titles
For fun, let's check the players'
average ranking in these 6 metrics!1. Michael Jordan
2. Kobe Bryant
3. Hakeem Olajuwon
4. Dwyane Wade
5. Isiah Thomas
6. Tim Duncan
7. Stephen Curry
8. Magic Johnson
9. Shaquille O'neal
10. Kareem Abdul-Jabbar
11. Lebron James
12. David Robinson
13. Kevin Garnett
14. Moses Malone
15. Dirk Nowitzki
16. Larry Bird
17. Kevin Durant
18. Chris Paul
19. Julius Erving
20. Charles Barkley
21. Karl Malone
Qualifier: not all ranks are made equal. Hakeem's 1st place rank in 'Delta Percentage (by SRS)' is out in front by more than the other 1st place rankings, for example. Presumably one could scale all the values to a similar scale, then take a weighted average to get a more accurate average of all 6 metrics. This is a quicker, simpler, but slightly less accurate way to average across these 6 metrics.
Some trends I noticed when comparing the Titles vs Expected Titles, as predicted by SRS, Preseason odds, and pre-Postseason odds:
-Improvers:
Tim Duncan's ranking improves the most by going to betting odds, improving by ~9 spots. It seems the bettors pretty severely underrating the Spurs. I would guess 2014 is one of the underrated years.
Curry's ranking improves significantly too, rising ~5 spots. I would guess 2015 and 2022 helps Curry here. Both end up in the top third of the 'Average Rank' list above.
Jordan and Robinson also improve by ~5 spots when using Delta Percentage, but stay fairly consistent using a plain Delta. The improvement likely helps Jordan nab the top spot above.
-Fallers:
Shaq falls the most when using betting odds, around ~5 spots.
LeBron falls ~4 spots, and falls more using a plain Delta compared to a Delta Percentage.
Magic also falls ~4 spots, falling more when using postseason odds and plain Delta. All three go from being above average when doing Titles vs Expected Titles by SRS to slightly below average by betting odds, ending up about middle of the pack in the final list above. It seems bettors were higher on them than SRS.
Kobe falls ~3 spots when using betting odds, but is consistently high enough in everything that he still ends up 2nd overall in the final list above.
Hakeem falls -5 spots in 'Preseason Odds Delta', and falls -8 spots in 'Preseason Odds Delta Percentage', but is high enough in the other four metrics to still get third overall. It seems people were higher on Hakeem in the preseason, and got lower on him by the end of the regular season to match SRS.
Finally, how do these metrics compare? We can look at which of these 3 metrics have the smallest difference between their Expected Titles and true Titles, at least in this limited sample of players. Here's the Average Magnitude Error in 'Delta' (difference between titles and expected titles):
-SRS: off by 1.27 titles on average
-Preseason Odds: off by 1.09 titles on average
-Postseason Odds: off by 0.92 titles on average
So in this sample of more recent players,
it seems like Postseason Odds > Preseason Odds > SRS. Which makes a certain amount of sense, as Postseason Odds can account for context and more recent knowledge that Preseason Odds misses, and both can provide deeper contextual analysis than SRS alone. Still, there are probably biases in the odds that can be improved with the help of more objective metrics like SRS. Interesting stuff!