© 2007 MLB Advanced Media, L.P. All rights reserved.

09/22/07 10:33 PM ET

Notes: Davis sorts out struggles

Diamondbacks southpaw detects flaw in delivery

PHOENIX -- Doug Davis thinks he has figured out what caused him to struggle in three of his last four starts.

As for figuring out the game of baseball itself? No chance.

"Once you think you've got it figured out, something happens," Davis said. "It's what makes it a frustrating sport. I thought I had it figured it out and now it's gone again. That's why in baseball, you've got to be mentally strong."

It seemed for a near two-month stretch, Davis couldn't lose. He won eight of nine decisions during that time and seemed to have his early season mechanical issues ironed out.

But over his last three starts, the left-hander has not made it out of the fifth inning, prompting him to wonder if he was tipping his pitches. After looking at video, though, he realized his problem was mechanical with his right shoulder flying open, causing his arm to drag behind.

When that happens, hitters get a better look at the ball, which could explain why the Dodgers seemed to be on every one of his curveballs recently.

Davis will put the new mechanics to work Tuesday when he starts against the Pirates in Pittsburgh.

"I don't know if I have the answers," he said. "There's only one way to find out."

Speaking of starting in Pittsburgh: D-backs manager Bob Melvin declined to say who would start Wednesday or Thursday's games in Pittsburgh.

"[The decision is] depending on how everybody does, how everybody feels, so we'll monitor that," Melvin said. "I don't have anything to say about that right now."

The good performances of late by both Edgar Gonzalez and Micah Owings have no doubt made Melvin's rotation decisions a bit trickier, but the manager said the reason he has not decided on starters for the Pittsburgh series has nothing to do with lining things up for the postseason.

"No," Melvin said. "Not at this point."

No trouble here: A chasm has been exposed this week between the veterans and young players on the Dodgers, but on the other side of the field, the D-backs have had no such problems incorporating rookies into their lineup.

"These guys play the game the right way," Melvin said of his young players. "We kind of stressed how we were going to play in Spring Training and they've all bought into it."

Though their numbers aren't as good as most expected before the season, they've managed to find a way to contribute.

"I've kind of refrained from saying it, but what these guys have accomplished this year has been nothing short of spectacular," Melvin said. "We've got a ways to go here, but every one of these guys ... it's been pretty spectacular to see.

Play the D-backs way: Registration is now being accepted for the 17 Arizona Diamondbacks Training Centers baseball clinics and five softball clinics that will take place this fall and winter in 11 Arizona communities.

The weeklong fall camps will feature more than 15 hours of basics of hitting, fielding and pitching instruction for 6-to-12-year-olds. The winter schedule offers three-day camps, which are condensed versions of the weeklong clinics. Both camps feature at least one instructor for every 10 students in camp and will teach the fundamentals of the game based on skill level.

Enrollment for each camp is limited. For more information and to register, please call (800) 821-7152 or visit dbacks.com/camps.

Up next: The D-backs wrap up the home portion of their schedule with a Sunday afternoon game against the Dodgers.

Gonzalez (8-2, 4.61 ERA) will face off against Chad Billingsley (11-5, 3.15) at 1:40 p.m. MST.

Steve Gilbert is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.