"What James didn't consider, and what I certainly didn't until today, is that expansion might dilute the level of grounds crew talent. That 1990s double expansion left us not just with 15% more MLB stadia, but 15% more baseball stadia throughout the professional ranks. It's taken a while for that effect to show up, but I think what we've seen in Chicago and New York this summer is the bleeding edge of a crisis that threatens baseball diamonds around the country."