NEW YORK -- Yankees closer Mariano Rivera walked off the mound after throwing only six pitches against the Boston Red Sox because of tightness in his right shoulder Saturday.

	Rivera

"I'll be all right, I think,'' he said after a 9-8 win in 11 innings. "They'll decide tomorrow what we're going to do. I don't know what. They haven't told me yet. No pain, just tight. I have had this before.''

Yankees manager Joe Torre was worried, naturally.

"There's no question it's a matter of concern,'' Torre said. "But this is not something new with Mo. He's had this before and usually been able to work through it.''

New York led 6-3 when Rivera was summoned in the eighth inning with no outs and runners on second and third.

Rivera struck out Manny Ramirez with a fastball, but allowed a two-run single to Jason Varitek. After the count went to 2-1 on Shea Hillenbrand, Torre and a trainer bolted from the dugout to the mound.

Following a brief discussion, Rivera was pulled. The Yankees' career saves leader slowly walked back to the bench with his hands at his side, accompanied by a trainer.

Rivera was put on the DL for the second time in his career on June 10 because of a strained right groin. He returned on June 25.

Last Sunday in Cleveland, Rivera gave up a game-winning, two-out grand slam in the bottom of the ninth inning to Bill Selby. Rivera came back to earn saves Tuesday at Toronto and Thursday against Detroit.