Dan Haren has left his first start for the Los Angeles Angels in the fifth inning after a line drive by Boston's Kevin Youkilis apparently hit him in the right forearm.
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The Angels acquired Haren in a trade with the Arizona Diamondbacks on Sunday.
The three-time All-Star had eight strikeouts against the Red Sox before Youkilis hit a two-out drive back to the mound. Haren was hit in the arm while attempting to catch it.
Haren dropped to his knees in pain on the infield grass, and the Angels' training staff quickly ushered him off the field. Fans near the Angels' dugout gave him a standing ovation, which he acknowledged with a tip of his cap.
Francisco Rodriguez replaced Haren with Los Angeles trailing the Red Sox 2-1.
Oddsmakers from online sports book Sports Interaction have made the Angels 40/1 long-shots to win the 2010 World Series and are 20/1 to win the American League Championship.
Posted: 7/27/10 2:40AM ET