The Cincinnati Reds activated right-handed reliever Max Schrock from the injured list Friday. Schrock was placed on the injured list on April 7 due to a calf strain. The team has yet to assign him to the minor leagues. Schrock will not be eligible to return to the major leagues until at least the early part of June. The Reds will have to see how Schrock responds to the injury to determine whether he is ready to return to the major leagues.