Baseball has such a long history of proud consistency and a culture built on self-referential comparisons between eras. From a distance it’s defined by sameness across centuries, but when you zoom in, it feels like we're always in a moment of pivotal — and controversial — change. That was true of the last decade (10 years ago there wasn’t even in-season testing for human-growth hormone, only the Los Angeles Angels were interested in a young man named Mike Trout, and instant replay applied only to home runs) and it will certainly be true of the 2020s.
The Pen: How baseball might change in the 2020s
