From what it sounds like I think they let Barrett and Zambrano go at it in the clubhouse for real, and it looks like Barrett got his ass kicked... he has two black eyes and seems real messed up. I can only imagine what they were saying to each other before that scuffle in the dugout:
Zambrano: Use your head, Barrett! (points to head) Use your head! You idiot, why make that throw, dumb-s@%@!
Barrett- (points to scoreboard) Check out the scoreboard, I think you just let up 7 runs and your ERA is almost 6
Zambrano- Oh now you're gonna get it! (attempts to fight Barrett but actually just starts slapping him upside the head)
"Oh, that Lankford and McGee, the trio of 'em. They're a one-man wrecking crew."