Ok, responding to too many people here, so let me take this point by point
Youk's sample size is nowhere CLOSE to as small as Nixon, hence Nixon having the note next to his name, and not Youk. I wasn't trying to pretend that Youk has had as many PAs as Manny or Varitek, but I think he's seen enough playing time to say that his taking pitches has not been hurting his performance, or the team. I think just about every player would have a high OBP if they swung at called 3rd strikes. I also think that some of the calls that Youk does not get is purely a result of his being a rookie, as opposed to ML umpires having a different zone. I think HE'S just getting an expanded zone to a small degree.
Mueller = No Crespo = Happy JM
In response to Mueller's absence not forcing Crespo into the lineup, I don't think that's the issue. The issue is that Mueller AND Pokey being injured forcing Crespo into being our only IF backup. Either one coming back = almost no Crespo, like we have seen since the 6th.
The reasoning for sending Youk down instead of Mueller (Youk's cheaper) could also be used as an argument for shopping Mueller for pitching once he's back healthy. This would be dependent on a healthy Pokey as well, of course.