TEMPE, Ariz. -- With starting pitchers as well as position players staying in games longer, the number of innings available for backups is shrinking.

With that in mind, the D-backs made several roster moves this week.

The club assigned infielder Andy Tracy, outfielder David Winfree and pitcher Clay Zavada to Triple-A Reno; pitcher Matt Gorgen and outfielder Marc Krauss to Double-A Mobile; catcher Rossmel Perez to Class A Visalia; and pitcher Juan Jaime to Class A South Bend.

"We expect them to show leadership and carry the message where they're headed," D-backs manager Kirk Gibson said, referring to the tone and style of play the team tried to set in big league camp.

The moves leave the D-backs with 54 players in camp, including 15 non-roster players.

Gutierrez throws another scoreless outing

TEMPE, Ariz. -- An adjustment to his pitching mechanics is apparently all it took to get Juan Gutierrez back on track.

The D-backs right-hander tossed a scoreless inning against the Angels on Friday, the second straight appearance in which he has not allowed a run. That came on the heels of his first three outings, when he allowed seven runs in 2 2/3 innings.

"My arm feels good," he said. "I've been working a lot after the first three outings. I've been making adjustments the last two outings, working in the bullpen hard with my pitching coach. I feel more comfortable with my mechanics."

Gutierrez was flying open with his front shoulder in his first three appearances. That allows the hitters to get a longer look at the ball before he releases it. When he stays closed, as he has in his last two outings, it creates more deception.

In addition, Gutierrez has been better able to locate his breaking ball.

"He's coming," Arizona manager Kirk Gibson said. "He's getting better. He's feeling much better about himself. When he dumps his breaking ball over, his fastball is much more dominant."

Saunders scratched after taking ill

TEMPE, Ariz. -- D-backs left-hander Joe Saunders was scratched from his scheduled start Friday against the Angels due to an illness.

"He's sick so he's not going to pitch today," said manager Kirk Gibson, adding that he was not sure what symptoms Saunders had.

Minor League lefty Wade Miley started in place of Saunders and allowed five runs on eight hits over three innings.

Saunders has made three starts this spring and has yet to get out of the third inning. Gibson said he will slot Saunders back into the rotation after he's feeling better.

"It won't be a big deal," Gibson said.