THe Yankees did a great job identifying players like Voit, Urshela, Tauchman and Grigorius. But this wasn't commentary about position players.
Your comment was about how the Sox have not developed any starters since Buchholz and Lester - at least not in the cradle to grave fashion. This is true. But my point is, despite a lot of hype, the Yankee haven't either. In that timeframe since 2007, the Yankees have developed 4 starters this way - Severino, Montogmery, Nova and Phil Hughes. That's not exactly a lot of development over the past 12 seasons, and really, coutning Montgomery might be a bit premature given he really has not pitched all that much. So while the Sox might get an "F" in starting pitcher development, the Yankees are in the "D" to "D-" range. The big difference is, the Sox NEVER seem to have pitchers cracking anyone's top 100 list. Groome and Ball made one appearance each. Henry Owens made BA list. Not much else. And the book is far from closed on Groome. The Yankees, on the other hand, must have had more SP ranked over the past 12 years than the Sox. But it has not translated into a better revolving door of SP.
Really the Sox big issue is that they keep trading away the starting pitching. It's a bit of a fallacy to say they have not drafted or developed a MLB started since 2007; they just have not kept one. Montas, Beeks, Allen. All traded away. Still not a lot, but it does keep this from being an absolute "0" here...