"We will activate him tomorrow," Francona said. "After the game today, we will have to [make a roster move]. We are not going to fly someone all the way to Seattle unless something happens."
Chamberlain worked through a 20-pitch mound session on Saturday afternoon and recovered as expected from his first simulated game. Prior to his DL stint, Chamberlain posted a 1.93 ERA with 15 strikeouts and six walks over 14 innings.
Shane Jackson is a reporter for MLB.com based in Cleveland. This story was not subject to the approval of Major League Baseball or its clubs.