White Sox's Peavy undergoes MRI

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Chicago White Sox pitcher Jake Peavy underwent an MRI exam on his right arm and upper back Wednesday morning. The results are not yet known.

Peavy took himself out of Tuesday's game against the Angels in the second inning with what was described as a strained right back muscle. After delivering a pitch, he jumped off the mound and raised his right arm. He then walked to the dugout with trainer Herm Schneider.

Looked pretty bad.