We promised you some additional data pertinent to World Series HRs; lo and behold, we're actually following through on that promise...
A key column in the data is marked %WT HR...that's the one giving you the percentage of total HRs hit by the winning team in each WS. The grand total shows that winning teams have hit 55% of the HRs that have occurred in the WS, with the HR/G per team average now settling in at .72 (...if you're calculating at home, remember to multiply that G total by 2 in your equation to get homers per game per team).
As you'd probably expect, that average HR/G total has been rising over time, as the various time slices indicate.
Such a scenario has remained viable in the twenty-first century, as you'll see by noting the fact that four of the seven teams with the greatest negative differential are post-1999 teams. Of course, 2015 was a more different brand of baseball than what we've experienced over the past five years.
Having seen this list, you may be wondering just how monolithic the HR differential is in helping to determine the WS winner. We have a nifty little chart that summarizes all of those differentials in terms of the WS winners and answers that question for you.
The totals for each row tell you how many times teams with positive & negative differentials won the WS. That 61-to-33 looks very decisive...but we need to include those WS where the differential was zero. As noted in the far right column, that figure is 23. (For completists, the years in which teams hit the same number of HRs in the WS are as follows: 1905, 1906, 1907, 1909, 1912, 1918, 1921, 1923, 1926, 1934, 1943, 1948, 1971, 1974, 1981, 1985, 1990, 1991, 2000, 2001, 2007, 2018 and 2019.)
So your half-empty/half-full perspective on this aspect of WS performance hinges on where you attach those zero differential games. Do you say "teams that hit at least the same number of HRs as their opponents in the WS win the series 72% of the time" (84/117), or do you say that "teams that outhomer their opponent in the WS win the series 52% of the time" (61/117)?
We'll let you decide. Note, however, that WS teams who outhomer their opponents by three or more HRs have won nearly three times as many WS as the teams who are outhomered by their opponents by three or more HRs (35 to 12). 47 of the 117 WS fall into that category, or 40%; that means that the HR differential range from 0-2 accounts for 60% of the WS (70 of 117).
With that, you are free to go gentle into that dying of the light known as the off-season.