DETROIT - Detroit Tigers left-hander Mike Maroth is scheduled to undergo arthroscopic surgery today to remove bone chips from his left elbow.
The 28-year-old Maroth has been dealing with elbow problems since April but hadn't missed a start until Tuesday. He was placed on the disabled list May 26.
Maroth is 5-2 with a 3.56 ERA and 22 strikeouts in nine starts this season, his fourth with the Tigers.
He felt recurring irritation in the elbow during his previous start on May 25 at Kansas City. The problem prevented Maroth from fully extending his arm, and he had one of the worst outings of his career, allowing six runs and six hits in the first inning, including three consecutive homers.
YANKEES: Outfielder Gary Sheffield returned to the 15-day disabled list, and All-Star closer Mariano Rivera became the latest ailing player for New York.
Rivera hurt his back early Thursday, and the Yankees said he wouldn't be available against the Tigers.
"He had one shoe on, and when he went to put the left shoe on, something spasmed," manager Joe Torre said before Thursday's game against Detroit. "It's something new every day."
DODGERS: Infielder Jeff Kent went on the 15-day disabled list because of a sprained left wrist.
Kent's stint is retroactive to Sunday; outfielder Joel Guzman was recalled from Triple-A Las Vegas to take his roster spot.
Kent missed his fifth consecutive game Thursday, when the Dodgers opened a seven-game homestand against Philadelphia. He sprained his wrist swinging at a pitch against Washington on May 27.
- Cincinnati sent left-hander Ben Kozlowski to Los Angeles, completing an earlier trade for outfielder Cody Ross.
ANGELS: Kelvim Escobar and the team agreed to a $28.5 million, three-year contract extension that runs through 2009.
Escobar, a 30-year-old right-hander, is 5-5 with a 3.96 ERA in 10 starts this season.
Escobar gets a $1.5 million signing bonus, $8.5 million in 2007, $9 million in 2008 and $9.5 million in 2009.
The pitcher signed with the Angels in November 2003 after pitching five full seasons and parts of two others with Toronto.
"I wanted to stay here. I love it here," Escobar said.
- Bartolo Colon pitched four shutout innings for Class A Rancho Cucamonga of the California League in his first rehab start, and figures to make one more outing in the minor leagues before returning to the team.
INDIANS: Cleveland pitcher Scott Sauerbeck pleaded not guilty to obstructing official business and permitting someone intoxicated to drive his car. The 34-year-old pitcher will have a pretrial hearing June 22, with trial set for July 11.
ATHLETICS: Oakland placed second baseman Mark Ellis on the 15-day disabled list after he broke his right thumb Tuesday against Kansas City. He could be out six weeks.