It was the makeup of an interleague contest rained out in June.
The Phillies scored three times in the bottom of the eighth to take their third lead of the game, but closer Jose Mesa (5-7) could not seal the deal. Manager Larry Bowa called upon Turk Wendell, who has been awful of late, allowing nine runs in his previous five appearances. He stayed true to form, walking in the tying run before serving up Nixon's seventh career grand slam.
The second grand slam of the season by Nixon made a winner of Red Sox closer Byung-Hyun Kim (6-4), who yielded one hit in 1 2/3 scoreless innings.