Cooperstown Notebook: Insights from the Spreadsheets, Part 2

Our story so far: At the end of every Hall of Fame election cycle, I have a set of spreadsheets that I update that help me track voting patterns and other long-term trends, as well as some demographics regarding any honorees. Because the 2021 election cycle yielded no honorees — BBWAA voters pitched a shutout, and the two Era Committee votes were postponed — I realized while going through this year’s post-election exercise that I had yet to reckon with the impact of Major League Baseball’s 2020 decision to recognize seven Negro Leagues that operated from 1920 to ’48 as major leagues. Not that I haven’t covered various angles of that decision, particularly as they pertain to the Hall; just that my tools of the trade haven’t kept pace.
I concluded my previous installment with a timeline illustrating the number of active Hall of Famers per team per season, using the Hall’s definition of one game being enough to represent one season played. It’s a display that illustrates the saturation of the immediate pre-World War II era via a very generous Veterans Committee and the extent to which voters haven’t kept pace with the later waves of expansion.

As previously noted, the above version does not include the 28 Hall of Famers elected for their playing careers in the Negro Leagues, a few of whom (Willard Brown, Monte Irvin, and Satchel Paige) had stints in the American and/or National League once they integrated, but not the 10 years needed to wind up on a BBWAA ballot. Adding those players compresses the pre-war peak, quite noticeably:

The scales are the same on the two graphs, but the broad peak in the middle is lower, with the space in the 2.5–3.0 range nearly empty. I did away with the BBWAA/committee distinction on this one, because I can’t stack the values if the denominators are different; the white Hall of Famers are coming from one player pool that for the 1920–48 period was constant at 32 teams, and the Negro Leagues Hall of Famers are coming from another that for the period in question ranged between six and 19 teams.
(Note that I’ve counted every team, even though some were very short-lived, loosely affiliated, and/or lacking in data that’s up to the Seamheads/Baseball Reference standard. I did draw the line by excluding the 1933 Cleveland Giants, who have data for just Negro National League games on B-Ref; they were apparently the replacement for the Columbus Blue Birds, who dropped out, and all 10 of their players appeared with other teams in the league during the same year, so leaving them out seems appropriate. Within the 49 Negro League-seasons now counted as majors, there might be a few other such instances of teams that shouldn’t be double-counted for the purposes of this exercise, but that will require closer study.)
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