Joba Chamberlain assumes he will enter the Carl Pavano Memorial MRI tube today at New York Presbyterian Hospital.

Has there been a more frightening sentence in the Yankees Universe this season?

On a night when the game-time temperature was in triple digits, the spines of Yankees fans everywhere went cold at the sight of Chamberlain walking off the mound with trainer Steve Donohue in the fifth inning last night at Rangers Ballpark.

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