Graveman, who is not starting against the Yankees this weekend, is dealing with shoulder soreness, Susan Slusser of the San Francisco Chronicle reports.
It's troubling news considering Graveman missed the latter half of April with the same ailment. The best-case scenario for both parties seems to be giving the right-hander some extra rest and hoping he can make his next scheduled start, Thursday against Cleveland. Sean Manaea will be taking his spot for Friday's series opener versus the Yankees and Jharel Cotton will slide into the rotation Saturday.