The Boston Red Sox have designated A.J. Pierzynski for assignment.

In a related move, the club has promoted catching prospect Christian Vazquez.

Vazquez, 23, will make his major league debut Wednesday night against the Chicago White Sox and bat ninth.

John Farrell said the move didn't represent the Red Sox waving the white flag on the season, but said the team is "turning the page in terms of investing in young players."