CHICAGO (AP) -The Washington Nationals placed right-hander John Patterson on the disabled list after Sunday's 4-3 10-inning loss to the Chicago Cubs because of elbow inflammation and he could miss at least a month, manager Manny Acta said.
They also activated shortstop Cristian Guzman (strained left hamstring) and outfielder Nook Logan (sprained left foot) and sent outfielder Michael Restovich to Triple-A Columbus.
Although an MRI on Sunday revealed no structural damage, Patterson was told he has fluid and inflammation in his elbow. He left in the third inning of Saturday's start against the Cubs after reporting pain in his right biceps.
After making only eight starts in 2006 because of nerve problems in his right elbow and undergoing surgery last July, Patterson is 1-5 with a 7.47 ERA this season.
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