As long as baseball has existed, there have been teams looking for an edge in how to evaluate players. This became a mainstream obsession when "Moneyball" brought "market inefficiencies" into the baseball fan lexicon 18 years ago, leading to a publicly tracked evolution of how the cutting-edge clubs have found value.
The window from when a team or two has an edge to when the majority of the league copies them is now down to a couple of years at best. Here's a breakdown of the two main trends clubs have been chasing through the lens of the two teams doing it better than anyone else right now.