Originally Posted by Craig Grebeck
Alexei is effective because he is a middle infielder. The likelihood that a player can improve his plate discipline is very, very small; it just doesn't happen very often.
Joe Crede, Robin Ventura, Mark Johnson, Aaron Rowand, Carlos Lee, and Chris Getz all managed to improve their plate discipline significantly, and that is just off the top of my head. Improving plate discipline is not that difficult a task.