Graveman has been replaced as the Athletics' starter against the Yankees on Friday, Jane Lee of MLB.com reports. Sean Manaea will take his place.
Manaea will take Oakland's first turn for the weekend series. Graveman's 5.48 ERA in May has soured his fantasy outlook after a brisk 2.25 ERA in four April outings. Still, Oakland should soon clarify if it is removing him from the rotation entirely or merely shuffling things around.