Put yourself in Dave Dombrowski's shoes.  You are now the President of Baseball Operations for the Boston Red Sox, a franchise that looks like it needs to make some serious moves in order to better themselves heading into next season.  With young stars already producing at the major league level and baseball's #1 farm system developing in the minors, shipping off some young talent for more proven players could certainly be an avenue you could explore.  If you had the final say, who is the one promising young player you absolutely wouldn't want to part with in the immediate future?