Winn will be shut down for seven days after an MRI on Monday determined that his right elbow injury is nerve-related, Susan Slusser of the San Francisco Chronicle reports.
While it's good news that Winn doesn't have any structural damage in his elbow, he's still going to require some extended down time, especially since he's on the 15-day injured list for a second time this season with an arm-related issue. Since he won't begin a throwing program until late June, it's probably safe to rule Winn out at least through the All-Star break.