Nationals right-hander Ryan Drese had an MRI on his right elbow and it was revealed on Monday that he has a flexor tendon strain and surgery is not needed. Drese is expected to miss four to six weeks of action.
Following Monday's exam, Dr. Lewis Yocum -- in conjunction with Nationals orthopedist Dr. Ben Shaffer and medical director Dr. Bruce Thomas -- recommended that Drese begin a rehab program on the right elbow upon return to Washington, D.C., on Friday.
In the bottom of the fifth inning and with two outs on Friday night, Marlins first baseman Mike Jacobs stepped up to the plate and, with the count 0-2, Drese couldn't throw another pitch. Pitching coach Randy St. Claire walked to the mound for the second time in the inning. Suddenly, St. Claire looked into the dugout and out came manager Frank Robinson, who motioned for left-hander Joey Eischen in the bullpen.
This is Drese's second injury in less than a year. Last season, he missed most of September because of a cartilage tear in his right shoulder.
In the meantime, left-hander Billy Traber is expected to replace Drese in the rotation and will pitch against the Phillies on Thursday.
Bill Ladson is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.