With runners on first and third, Derek Lowe attempted a pick off move, successfully putting the runner in a pickle. Rather than taking the guaranteed out, Escobar threw home and failed to record an out. This fielding misjudgment upset Bobby Cox enough that he benched Yunel.
This is not the first time Yunel has rubbed the Atlanta skipper the wrong way. In a 2008 summer game against the Brewers, Escobar was ejected for arguing with the umpire before Bobby had a chance to make it onto the field. After this incident Cox expressed disappointment that Escobar failed to realize the importance that he remain in the game and give the team a chance to win.
Bobby Cox takes a great deal of pride in his players doing things right and does not tend to tolerate very much non-sense from his roster. In the past, disruptive players that have displeased Bobby Cox and other management have been traded rather quickly.
While I do not feel that Escobar will be gone before the next series, it is important to note that the Braves do command a hot trade commodity in Yunel. There are certainly a number of teams searching for a shortstop right now, and as the Braves search for the answer to their offensive woes, Escobar may have already volunteered to be traded.