I don't know if it's something the Tigers' organization is teaching, but Keith seems to have been almost trying not to be a power hitter and more of a "go with the pitch" hitter and "line drive" hitter. When he was hitting .300 a few weeks ago he was getting
mostly singles. The problem was that this sapped him of his natural power. The other troubling sign for Keith this year is that his walk rate is only 5%, which is below average (MLB average is 8.5%). It was 10% last year. HIs K rate is at 20%, which is
about the same as his last 2 seasons and lower than MLB average (MLB K rate is 22%). So it's not like he's having problems making contact. It's just that his contact hasn't been that hard and he isn't working the count as well as in the past.
When Keith came up through the minors, he looked like a guy who could hit 25+ homers, a lot of doubles, and draw a good number of walks and not strike out excessively. He even hit lefties ok in the minors and as a rookie in the majors.
I think you can argue that by not letting Keith hit against lefties the last 2 seasons, his development as a hitter has been stunted, but his approach has changed as well. I'm not sure what he's been working on is actually helping him, but maybe it's a long-term
process.
Trying to hit major league pitching is very difficult so it can take some good hitting prospects a few years to figure it out. Keith isn't the only good young hitting prospect who takes a few years to find himself in the majors.
Peter