That's the point, the Sox pen isn't pretty good front to back. But if they can get 6 innings out of Rodriguez they can go right to their very good closer. Also, as BohKnows pointed out, they just played a 12-9 circus ballgame where they burnt a lot of bullpen, a rainout bails them out a little. Not really important in the big picture, but it's something to talk about.
I hate the seven-inning doubleheaders way more than the extra inning rule.