Sour grapes? That's interesting rhetoric, but I don't think even YOU believe that GOM. A couple of things to consider regarding Red Sox fans' views of this Yankee signing:
(1) I think most Red Sox fans considered it unlikely that he'd come to Boston anyway because (a) the Yankees would outbid the Sox and ( they understood that Clemens would not take on such a risky proposition in terms of his legacy.
(2) Desperate times require desperate measures...the Sox are playing well and sit atop the AL east. Even if positions were reversed, the Sox would take a somewhat more reserved approach toward Clemens, despite what might have transpired in the off-season.
Meanwhile, the Yankees ARE desperate...in fact I think desperation, as defined by the Yankees, is any situation where they're not clearly driving toward the playoffs. Any faltering, even as early as May 6th, is viewed as desperation by the Yankees brass.
Get over yourself, big guy, and don't confuse "sour grapes" with what is more likely a bit of apprehension regarding the Yankees ability to make personnel moves that turn the tide.