Yes, teams get hot and cold over the course of the season. But, as I have said before, teams can change significantly over the course of a season as players get injured, come back from injury, shuttle between AAA and the MLB club, and change teams through trades and waiver pickups.
Using the 2026 Brewers as an example, how relevant are results generated in April when Rengifo, Lockridge Perkins, and Frelick were getting regular playing time and Black and Jones were filling in? So, my opinion is that using more recent data provides a better picture of the current state of the team, and what to reasonably expect in the near future.
Some of the same people who are bothered by my focus on the games after the Coors/Vegas trip routinely started posts in 2021 with "Since the Adames trade..." thereby brushing aside the team's mediocre performance before that trade. But I don't remember anyone complaining about cherry picking
I would be interested in input from other advanced stats devotees about whether xwOBA is really the best metric to use in this context. It seems like I see wRC+ cited a lot more often when evaluating team and player offensive production.
'Applying a predictive metric to a team (as opposed to a player) really seems flawed because the mix of players might be significantly different in the future .
Anyway, however you decide to come to the conclusion, anyone is going to have a hard time convincing me that the Brewers offense is as good as the Cubs'. It's not because I don't "believe" the numbers being thrown around. But I do question that they lead to the conclusion that the offenses are almost equal.
BTW, does anyone have the team wRC+ numbers for season to date?