Surely, you don't refer to this season when, earlier, Colorado took two out of three games from Boston in Fenway and, in the process, handed Josh Becket his first loss of this season.
Yes, I suppose you're right . . . Beckett's pitching really suffered after that hugely significant series, putting the Sox in a tailspin from which they never quite recovered, not to mention demoralizing them when they faced the Rockies the rest of the season.