Originally Posted by dougdirt
I guess with Andrus there are a few things at play. First, he played a full season in the Majors at 20. You would expect a teenager to generally gain a tad bit of plate discipline moving forward. Doesn't always happen, but you do expect it in most cases. In the minors from age 16-19 he walked 8.4% of the time. In the Majors he isn't really walking much more than that (9.1% over the last three years).
At a young age he showed a solid ability to draw a walk. Under 10% though to me is just taking advantage of pitchers who can't always throw strikes. Right now though, Hamilton is walking as much as Joey Votto. That isn't going to happen. If Hamilton walks as often as Andrus, I don't think it would surprise anyone. 9% seems reasonable. 14%, that doesn't.
Hamilton is walking at a 17.5% rate in AA right now -- those are literally current Votto numbers. What makes it even more impressive is that even Votto wasn't walking at a clip comparable to that in the minors. Hamilton's pitch recognition abilities have been advancing through the roof. Even if you think that his walk rate will suffer when hitting the majors it's not like they're going to completely disappear.
For the most part if you look at almost any player walk rates tend to transition pretty closely when moving up. Considering that Hamilton is still developing I wouldn't be surprised at all if he could post a 14% walk rate at the major league level.