Well he inherited the 2012 club, and won it all in 2013. The 2014 team that was the same team that won it ALL in 2013. He blew up that team and made many of the moves that make up the team today. Including the preservation of guys such as JBJ, Bogaerts, Betts and he Traded for what amounts to 40% of our rotation today in Porcello and Erod. Also, Porcello was indirectly traded for Lester who is having about as good a year for about 1/2 the money. If you go back to one of his earlier trades for Stephen Wright then He's responsible for 3/5 of our rotation in Porcello/EROD/Wright. He brought in key guys like Napoli, Drew, Koji, Victorino, and despite pressure held onto the farm. And if you want to credit Epstein for those farm guys remember he was also the assistant GM during that time and still had a lot to do with bringing them into the system but guys like Hanley, Porcello, Wrigtht, Koji, EROD, and Holt have all been a part of this team this year and will be key going down the stretch. He also drafted Benintendi, so his finger prints are all over this current team too.
Not saying he's perfect, never did.