Actually, I would disagree that extending CJ was Wren's doing. CJ was extended May 2 of 2014. Here is an article from a few months earlier crediting Hart with all the recent extensions (Heyward, Simmons, Theran, Kimbrel):
http://m.mlb.com/news/article/682417...rm-extensions/
The CJ extension was likely a result of the FO being drunk from all the goodwill flowing when Hart extended all those players. Somehow, they misidentified CJ as part of the "young core".
The Uggla extension probably does fall on Wren though.
He also bid against himself when he gave BJ way too much cash.
Nobody could have foreseen the McLouth disaster though.
Lowe was OK.
KK was a disaster, especially with Hanson waiting in the minors (I think, was a long time ago).