The Diamondbacks find themselves in a tough spot after dropping their season-high fourth straight game in a doubleheader sweep by Philadelphia on Saturday night.

Arizona will turn to lefty Brad Halsey to stop the slippage, while the Phillies will counter with southpaw Randy Wolf.

"This is a team made up of veterans and we're able to bounce back and look at [Sunday]," said pitcher Russ Ortiz, who took the loss in Saturday's nightcap despite pitching well. "Hopefully, we'll get two wins over the next two days."

What Arizona needs is more production from the heart of its order. Luis Gonzalez snapped a slump by going 5-for-8 in the doubleheader after going just 1-for-12 on the road trip. But Troy Glaus went 0-for-8 and is 3-for-19 on the trip.

Pitching matchup
ARI: LHP Brad Halsey
• 4-2, 3.65 ERA in 2005
• First career start against PHI

PHI: LHP Randy Wolf
• 5-4, 4.57 ERA in 2005
• Hasn't faced ARI in 2005

Player to watch
Tony Clark has been on fire on the road trip, going 7-for-10, including his 3-for-4 performance in Game 1 of Saturday's doubleheader. Clark started the game hitting .337 and raised his average to .356, after hitting his seventh home run in a 10-6 loss.

Quotable
"It's just a matter of getting the big hit, something we did earlier this year." -- Ortiz, explaining Arizona's four-game slide

On the Internet
 MLB.TV
 Gameday Audio
• Gameday
• Official game notes

On television
• ARI: 3TV
• PHI: UPN57

On radio
• ARI: KTAR 620, KSUN 1400 (Español)
• PHI: WPHT 1210, WPWA 1590 (Español)

Quick hits
Javier Vazquez had his four-game hitting streak stopped in the first game of Saturday's doubleheader, but increased his streak of no-walk outings to seven, though he took the loss in his worst start this season. ... Chris Snyder and Shawn Green both had four-game hitting streaks snapped in Game 1.

On deck
• Monday: at Phillies, 10:05 a.m. MT
• Tuesday: vs. Twins, 6:40 p.m. MT
• Wednesday: vs. Twins, 6:40 p.m. MT