Eric Longenhagen from Fangraphs is one of my favorite MLB prospects writers, in large part because he rarely recycles prevailing wisdom, and you can tell he's done a tremendous amount of research.
This is perhaps the deepest system in all of baseball, and one of the best.
blogs.fangraphs.com
"This is perhaps the deepest system in all of baseball, and one of the best, right up there with the Dodgers, Cubs and Orioles in terms of the number of 40+ FV or better prospects."
"The Red Sox under
Craig Breslow, who was previously responsible for revamping the Cubs’ pitching dev infrastructure, seem to be making proactive changes to deliveries and repertoires, even if the player they’ve acquired has had success operating in a particular way up to that point... This seems to be working, and the changes are stark enough that teams that feel like they’re behind in the pitching dev space should be looking at what Boston is doing to try to reverse engineer some stuff.