In the book Moneyball, the Athletics front office talks about process. For example, they cared less about the result of a plate appearance than how the batter got to that result. They would rather have a batter take an outside pitch than swing at it and get a hit. By confining swings to the strike zone, batters increased their probability of getting on base, as contact was more likely to result in a hit, and walks would go up as batters refused to swing at balls.
Adam Dunn would likely be a player the Athletics would love. Look where he swings:
In three of the four quadrants of the strike zone, Dunn does a fantastic job of swinging at balls in the zone. Even low and outside, he's not that far off.
This is where he takes pitches:
Again, low and outside is the only place where his process is off. That's where most pitchers throw to him however, and his judgement there created a hole they can exploit:
Adam gets some good calls on three of the corners, but the middle to low outside pitches belong to the hurlers. That's where they get him looking at strike three:
His chasing of the outside pitch and taking of pitches on the lower-inside corner expands the strike zone and gives opponents a spot to attack.