Forgetting for a moment that the notion of a "closer" is silly, Bobby Cox has two great arms at the back end of his bullpen in Rafael Soriano and Mike Gonzalez. One of these is right-handed, and the other is left-handed. When the guys due up in the 9th inning are (RH) Kevin Youkilis, (RH) Jason Bay and (LH) David Ortiz, which one would you bring it?
If you said you'd bring in the left-handed Gonzalez, congratulations, you've made the Bobby Cox Decision. But you're still wrong. Play the matchups, not the closer card. Especially when you're in the Braves' situation, with two great guys available to you.