The 30-year-old Marlins right-hander has a renewed and relaxed demeanor since becoming a member of the Miami Marlins.
After a tumultuous tenure with the Cubs, Zambrano has kept his emotions in check.
"Actually, I feel like I'm a new Carlos Zambrano because the old Carlos Zambrano would be throwing a chair and screaming at his teammates," said Zambrano, obtained from the Cubs for Chris Volstad.
Zambrano has been one of the most pleasant surprises for the Marlins. In five starts, he has a 2.53 ERA.
On Wednesday night, the 30-year-old was impressive in a no-decision against the Giants at AT&T Park. Zambrano was in line for the win after throwing seven scoreless innings.
Actually, in three of his starts he has had a chance for the win, but in all three games, Miami had ninth-inning leads disappear.
Four of his outings have been quality starts, and he has pitched at least six innings in every start.
While the Cubs, Zambrano's temper often got the best of him. In the past, you'd see him get enraged when things didn't go his way on the mound. Now, you see him smiling.
He credits his faith for becoming more at ease.
"I'm enjoying the game," Zambrano said. "When you have Jesus in your heart, what else can you ask? If I had found Jesus five years ago, I wouldn't have had problems in Chicago. But things happen for a reason."