How Many More World Series Would The Yankees Have Won Since 2009 (Or 2000) With Mattingly As Manager?

More than they did, that's for sure.  Joe Girardi was always the wrong choice, especially after the ineffectual second-half of Joe Torre's tenure.  Don Mattingly could have done a way better job in the 21st century for the Yankees than Torre and Girardi--or, given that they're the fucking Yankees, certainly would have done no worse.  Plus, he's Don Mattingly and not Joe Torre and Joe Girardi.