I think Scipio has me on ignore, but here's a blog article that answers their question
https://www.coverthosebases.com/blog...ate-mlb-season
Quote:
There are some pretty powerful insights that can be gained here. First, we see that after only 40 games, half of all team win percentage variability can already be explained. After 60, we’re nearing 72%, and after 80 games, we’re over 78%. The breakdown in tabular form is here:
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60 games is the answer that I would give - if I had to just give a number of games