After a little more than two weeks off due to inflammation in his right shoulder, Beckett will make his return start on Saturday night against the Seattle Mariners at Safeco Field. Beckett hasn't exactly had a career year thus far, posting a 4-7 record with a 4.14 ERA.
Per Cafardo, it's unclear to this point whether McDonald will be optioned down to Triple-A or simply designated for assignment. Of course the latter option would end his time with the Red Sox for all intents and purposes.
McDonald is in his third year with Boston, and is only hitting .209 with two home runs and nine RBI on the campaign.