Physically, Mat Latos still looked good last year. Mentally, I really doubt that at this point in his career he's capable of being The Guy. The guy's a fucking mental midget. In 2010 he spent the last month or so in a slump that extended through most of this year. When the pressure was on, he folded down the stretch but never stopped running his fucking mouth against the Giants. He then made some comments in the press against them to start the 2011 season and if memory serves me correctly, he shit the bed against them and everyone else he faced for the first two months of the year. Right now, he just looks like a guy who can talk a good game and can't back it up. He's going to need to mature really quickly because if he shits the bed in Cincy to start the year I could see things really snowballing for him.
The other thing I don't like about this trade is that Latos isn't a groundball pitcher. I didn't see him pitch much the second half of the year last year, but I don't remember him ever really sinking the ball. He's more of a flyball/strikeout pitcher and in that bandbox I don't like the way his style will translate. He'd be much better in a bigger park, like Petco. Unless he starts sinking the ball, but for a lot of pitchers making the transition from a pure power pitcher to one who can sink it and get a lot of groundballs, the evolution can come with a lot of bumps in the road. We'll see how he does, but from what I've seen from him, he doesn't have the mental makeup YET to handle such bumps in the road.