The Mets led by four runs over the Yankees in the ninth inning Friday night thanks to a tack-on run scored the inning before.

Daniel Murphy's triple off the glove of Yankees centerfielder Jacoby Ellsbury set up the score, turning the ninth inning into a non-save situation.

Nevertheless, Terry Collins went for the kill as he's done down the stretch, going to closer Jeurys Familia regardless of the cushion. He nearly got burned for it.

Familia survived, recording the final three outs of the Mets' 5-1 win over the Yankees. But twice, he was forced to work out of a bases-loaded jam, with the tying run at home plate.

He got Brett Gardner to fly out and Chase Headley to strike out.

For his troubles, Familia took a comebacker just below his left kneecap, sending a wave of shock to a bullpen that is already hurting.

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Both Collins and Familia said the knee was fine.

Still in doubt, however, is the status of setup man Tyler Clippard. According to Collins, Clippard felt tightness in his back after playing catch before the game.

"His lower back just grabbed on him and tightened up," Collins said. "He came in and got treatment on it. The trainer said he shouldn't have pitched tonight, so we didn't have him."

He was still being examined following the game, his availability for Saturday's game still up in the air.

With the Mets protecting a 2-1 lead entering the seventh, rookie Hansel Robles tossed a scoreless inning. The righthander has tossed seven shutout innings in six September appearances.

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Addison Reed, the Mets' primary seventh-inning reliever, threw a scoreless eighth inning with the Mets ahead 4-1.

"They were tremendous," Collins said of Robles and Reed. "I'll tell you, Addison Reed has been so much more than we could have expected."

Acquired in an Aug. 30 trade with the Diamondbacks, Reed has not allowed a run in his 10 appearances with the Mets.