The heat maps Baseball Analytics produces give a nice view of how pitchers and batters adjust to each other. Alexei Ramirez provides a good example of this in 2011. During his first three years in the majors, pitchers tended to avoid the inside part of the plate against him, but used most of the strike zone:
His power tended to be down and middle in.
In 2010, pitchers worked him away much more:
As the pitches moved away from Alexi, he moved his power with them:
So far in 2011, pitchers have worked him even further away:
Once again, Alexei moved his power with them:
Of course, this early in the season, those might just be a couple of lucky hits. So far in his career, however, Ramirez showed he can adjust to changes in the way pitchers work the strike zone, and turn a perceived weakness into a strength.