From all I can glean, it sounds like the new GM is going to be John Mozeliak. STLToday is reporting it as a done deal, and from what I’ve been told by a few different people, that’s certainly how it sounds to me as well.
First, personally, I want to congratulate Mo, who has handled himself gracefully through what at times has to have been a very awkward and uncomfortable time. He’s always been good to me, and I’m happy for him.
Second, to answer the question that already seems to be popping up quite a bit: Why let Walt go, then replace him with his second-in-command? The answer is that Walt wasn’t let go for reasons of performance or even, necessarily, baseball philosophy. He was let go for more personal reasons, that the situation within the front office became toxic. Divisions between different factions were allowed to fester, and it was not a healthy environment. Mozeliak should go about all of that very different. I believe he will work well with scouting and player development, with the "information department" (I believe that’s what TLR called it at his presser) and everyone else.
I’m honestly not informed enough about all the various candidates to know whether they hired the guy who will be the most successful GM. A lot of those guys have very nice resumes, but even so, it’s hard to know. Mo has a very nice resume too, having done a lot of different things within the organization. I’m curious to see how it goes.