Yankees reliever Joba Chamberlain was hit by a flying broken bat in the 12th inning and left Game 4 of the AL division series against Baltimore with a bruised right elbow Thursday night.

X-rays were negative.

Matt Wieters led off the 12th with a single to left field and shattered his bat. A large piece went twirling toward the mound and hit Chamberlain's surgically repaired pitching elbow.

Chamberlain threw down his glove and bent over in pain.

He was checked out by New York trainer Steve Donahue and manager Joe Girardi. While Chamberlain threw three test pitches, Girardi went back to the dugout.

Chamberlain finished his pitches and walked off the field with Donahue. David Phelps came in to relieve with the score 1-all.

The Yankees led 2-1 in the best-of-five matchup.