Re: Billy Hamilton continuing to excel at AA
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.