Wasn't there an incident with Murton earlier this year where Zambrano showed him up? I can't recall what exactly happened, but I do vaguely remember something taking place. I can remember one with Murton and one with Walker. I think there have been others as well. Zambrano, as much as I've liked him, is a punk. His bravado is fun and entertaining when he's going well, like his predicting the Cubs will win 110 games or his claiming he'll win the Cy. But when things go bad, he's an immature jackass. Barrett's an emotional player as well. We've seen this with Oswalt and AJ. The difference is Barrett is usually taking on the other team and not his own. That behavior may not be good, but it's world's better than pouting and blaming your own teammates. Zambrano was acting like a baby and Barrett called him on his prima donna attitude. Maybe if Zambrano started throwing the ball better and quit trying to act like Kent Tekulve he'd get more outs this year. Nice Tekulve reference.