Doesn’t the original graphic need a bunch of context to mean anything? If it only refers to 2024, who cares? Hudson had a huge year for Milwaukee after coming over in a trade. Tyler Jay has the best 3 innings of his short career after being acquired from the Mets. Obviously, Civale pitched much better for the Brewers and there was even marginal improvement from Montas. Of course that’s a lot of improvement and really only offset by DL Hall who pitched much worse with Milwaukee than Baltimore.
But what about Keuchel? He was not a “trade” per se, but was acquired from outside the organization. He made 4 starts, performed worse than he had been last year in the majors and got himself released. Mitch White was another purchase and continued to get clobbered in Milwaukee like he had in SF, and LAD.
Certainly in 2023, Chafin, Javy Guerra didn’t pitch very well after coming to Milwaukee in trades and in 2022: Matt Bush, Jc Mejia, and Rogers all pitched poorly for the Brewers as did Urena and Jake McGee who were in season acquisitions of a non-trade type.
Seems to me this is just slicing data in a specific way to support an argument, more than identifying an actual trend.