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06/18/09 3:03 AM ET

Wolf seeks answers for persistent cough

Los Angeles (43-23) vs. Oakland (28-36), 7:10 p.m. PT

LOS ANGELES -- If Randy Wolf doesn't have his best stuff against the A's Thursday night, he can always just breathe on them.

Wolf underwent medical tests Wednesday seeking a diagnosis for a persistent cough with a very unusual new theory: whooping cough. Wolf has been bothered by the cough for about six weeks. He said he feels fine otherwise and believes it has no effect on his pitching.

But whatever he has, it's left his voice raspy and he can't shake the cough. He hopes to have results of the bloodwork within a week.

The whooping cough theory was suggested in a roundabout way, through a doctor friend of former player Matt Franco. The doctor read of Wolf's symptoms and suggested through Franco that Wolf might be suffering from whooping cough (pertussis), which is contagious, although most children are immunized.

"It's been nagging and it's something more than a cold," said Wolf. "It really doesn't affect me. It just gives me a sexy voice."

Wolf is coming off what had the makings of his best start of the season, five scoreless innings on two hits in Texas Saturday night.

But a bank of lights went out, delaying the game for nearly two hours. Wolf was the pitcher of record at the time and the Dodgers led, but when play resumed, Wolf was relieved, the lead got away and Wolf wound up with his ninth no-decision of the season, even though the Dodgers won the game.

This will be Wolf's second career start against the A's, getting a win in 2003 while with the Phillies, allowing three runs in seven innings.

Although the Dodgers are 9-5 in his starts, he's picked up only three of those wins.

Pitching matchup
LAD: LHP Randy Wolf (3-2, 3.41 ERA)
Wolf threw five shutout innings on 67 pitches in Saturday's start against the Rangers. He was on pace for one of his best outings of the season but was taken out after an hour-and-41-minute delay. In seven home starts this season, Wolf is 0-1 with a 4.53 ERA.

OAK: RHP Vin Mazzaro (2-1, 1.37 ERA)
Mazzaro's career-opening scoreless innings streak ended at 17 2/3 innings Friday when the host Giants scored three runs in the bottom of the fifth inning on the way to a 3-0 victory. Mazzaro, 22, won his first two starts after being called up from Triple-A Sacramento on June 2, and he scattered six hits and a walk while striking out four over six innings against the Giants for his third consecutive quality start. Armed with a 96-mph two-seam fastball that runs away from right-handed hitters, Mazzaro has allowed 14 hits over 19 2/3 innings as a big leaguer, walking five while striking out nine.

Wednesday night's 5-4 loss dropped the Dodgers' record in one-run games at home to 12-2 (15-6 overall). ... Casey Blake has hit saely in a season-high eight consecutive games. ... Rafael Furcal's infield single in the ninth inning on Wednesday extended his hitting streak to 10 games. ... Andre Ethier has 10 RBIs in his past 10 games. ... Mitch Jones, originally called up to the Major Leagues in 2006 with the Yankees but never appearing in a game, was credited with his first Major League hit in the eighth inning on Wednesday as a pinch-hitter when A's second baseman Adam Kennedy was unable to catch his pop fly in shallow right field ... The Dodgers left 10 runners on base on Wednesday.

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On the Internet
 Gameday Audio
•  Gameday
•  Official game notes

On television

On radio
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Up next
• Friday: Dodgers (Chad Billingsley, 9-3, 2.72) at Angels (Joe Saunders, 7-4, 3.66), 7:05 p.m. PT
• Saturday: Dodgers (Jeff Weaver, 3-1, 3.72) at Angels (Jered Weaver, 7-2, 2.08), 6:05 p.m. PT
• Sunday: Dodgers (Clayton Kershaw, 3-5, 4.13) at Angels (John Lackey, 2-2, 6.10), 5:05 p.m. PT

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