Josh Beckett will miss Saturday's start in Pittsburgh as he continues to battle a stomach illness.
He is now scheduled to start Tuesday in Philadelphia against Phillies ace Cliff Lee.
Beckett missed a start on Tuesday with what Terry Francona called "intestinal turmoil." The plan was to him start Saturday against the Pirates, but Beckett is still feeling the affects of his bug.
Tim Wakefield will start in Beckett's place on Saturday. Andrew Miller is scheduled to pitch the following day.