Rookie left-hander Clay Zavada's performance level is as high as his energy level.

Zavada, 25, did not give up an earned run until the 10th inning of a 3-2 loss to Cincinnati on Thursday.

It was his 20th relief appearance this season—the string of 19 was the fourth-most games without an earned run by a reliever at the start of his career (since 1954).

"He attacks the strike zone," Diamondbacks manager A.J. Hinch said. "He has weapons. He has three pitches. He has great command, and that's a weapon in its own right. He expects to do well."

Zavada also shows his passion and intensity in the way he paces in the dugout during a game.

"He's wound up," Hinch said. ...More