25 lbs of muscle over 5 months (Oct-Feb) is roughly a pound a week, which any trainer can tell you is doable. He has all the resources. Many athletes have done this. Better eating, working out, from my experience its not that difficult.
Golly, I wish I could be a grizzled, world-weary cynic. If I were given that talent, even for a day, I would use it teach all those foolish MLB players exactly how naive their outrage is. Lord knows, somebody needs to teach them the facts of life and their place in it.
You can believe what you want. Reading the Sisco working with hitting guru article in the Sun the other day makes sense compared to what Davis has been saying about not wanting to change his swing. The hitting guru working with Sisco was saying some guys come to him fully willing to revamp their swing, whatever helps. Others have fear that they have the can't teach an old dog new tricks mentality, so he tweaks their already existing form and swing, or try the tweaks and revert back if they feel pressured or worried. My assumption is this year may be different than the last two. The last two, he probably was content to ride the bench, get his paycheck. But if he was considering walking away from $79M and retiring, I think there was some added motivation to hit the gym 2 times a day and take it more seriously. We'll see what happens of course.