In “The Bill James Guide to Baseball Managers,” Bill James devised a rather simple six-point system to assign a score to each season of a manager’s career. The system is not particularly sophisticated, but it produces what I think are reasonable results.
They say that imitation is the sincerest form of flattery, so — as I often do — I have decided to take one of James’ ideas and apply it to the NBA.
Within each season, I decided to award one point to the head coach for achieving each of the following:
- Finishing with a winning record (i.e., more wins than losses)
- Finishing with a winning percentage of .625 or higher
- Finishing with a winning percentage of .750 or higher
- Making the playoffs
- Reaching the NBA Finals
- Winning the NBA Finals
That’s a total of six points for each season.*
* You might be wondering “Aren’t the first three cutoffs rather arbitrary?” My answer is “Yes, but I think they’re reasonable.”
Based on this system, a “perfect” season would be winning the NBA Finals after posting a winning percentage of .750 or higher during the regular season. Fourteen different coaches have had at least one perfect season:
As you can see, Jackson is the runaway leader, with as many perfect seasons as Auerbach and Riley combined.
Anyway, that’s the system. Let’s move on and take a look at some results. We’ll start with the career leaders by total score:
This is a good start, but it does tend to over-reward coaches who have coached for a long time. One way to adjust for career length is to look at average score per season rather than total career score:
But this list has a problem as well, as coaches with fewer than five seasons end up making the cut. We might be able to solve that by requiring a minimum of 10 seasons as a head coach:
That’s better, but in my opinion Riley’s average score of 3.25 in 24 seasons is much more impressive than Jones’ average score of 3.30 in 10 seasons. We need a way to account for that.
My solution? Multiply the coach’s career total by his career average (the “Product” column in the table below):
This system is obviously far from perfect, but I think that looks about right. If numerous NBA experts were asked to create a Mount Rushmore of head coaches, I think Jackson, Riley, Auerbach, and Popovich would emerge as the clear winners. And as you can see in the list above, those four stand head-and-shoulders above the rest of the pack.
A few notes:
- Two coaches on this list — Karl and Sloan — did not win an NBA championship. Karl coached one conference champion, while Sloan piloted two conference champions.
- Cunningham is rarely mentioned when the subject of great NBA head coaches is brought up, but his eight-season run in Philadelphia was very impressive. His teams won 52 or more games in seven of his eight seasons, with a low of 47 wins in 1978-79. And in the postseason, the Sixers advanced to the Eastern Conference Finals six times, made three appearances in the NBA Finals, and won a championship in 1983.
- Brown coached nine different NBA teams, the same number as the top four coaches combined.
Let me close by stating something that should be obvious, but probably needs to be said: There are many, many things which should be taken into consideration when evaluating a head coach, most of which are not included here:
- Did the coach’s teams frequently exceed or fall short of expectations?
- How much did players improve under this coach?
- Was this coach a good in-game decision maker?
However, even if not directly addressed, many of these things will be reflected in the coach’s cumulative record.
Most of all, though, this is meant to be fun. This system should merely be a conversation starter, not stopper.