penbeast0 wrote:How far back do the records run? Do they include, say, Baylor and West from the 60s? Johnston and Arizin from the 50? Pre-1950 players?
Reference does BPM from the 1974 season forward when steals, blocks and distinct offensive and defensive rebounds were recorded.
Not all the numbers are quite the same ... leaving aside positional designations and different weightings there ... and there was suggestion of a simplified BPM estimate-y thing but at this point it's quite possible it's never coming
From the 1985 season to the present, the BPM values presented are summed-up game level values. Summing up the game-level calculations better handles strength of schedule. This improvement mostly has an impact on players that missed a significant number of games.
From 1974 through the 1984 season, the BPM values presented are the season-level values. From 1974 to 1977, turnovers are estimated using an approach given in the appendix.
From 1954 to 1974, a simplified BPM is coming soon.
via Basketball-Reference and Daniel Myers,
https://www.basketball-reference.com/about/bpm2.htmlLooking at Reference though West doesn't really hit his prime production levels until '64 as Baylor drops off by the Reference metrics available there. I guess '62 is the best shot (in terms of the metrics available as a proxy) where PER and WS/48 for West are at a glance very marginally below the worst they would be for the 64-73 period.
'56 or '57 Philly do have two high production guys. Johnston is more impressive by those RS metrics. I think maybe neither being big passers (otoh) might hurt more for BPM.
Stockton and Malone do each get to 8 at some point, but they don't share a season with each being over 7. Stockton has many 8 or above seasons ('88-'95 excepting '93), Malone only '97. Malone does spike above 7 in '93 in the year Stockton drops from his perch down to 6.6. The broad patterns continue in the playoffs (JS several [though fewer] seasons above 8, Malone now 0; still no seasons of both at 7 or better).