A lot of Yankees people talk about how the injury bug has hit them....I mean Sheffield and Matsui are big cogs, but lets look at Boston's starting rotation

Schilling--Amazingly dureable coming back from injury plagued last year
Beckett--Amazingly not had the blister issues of the past
Wakefield--Injured
Clement-Injured
Wells-Injured

At the beginning of the season, our closer was Keith Foulke.
Now our catcher. Our centerfielder got hurt out of the gate. Our right fielder combination (Pena/Nixon) have both been hurt and/or out.

I know the Yanks lost some offense, and had some ineffective parts, but honestly, I think the Sox injury list has been more severe just due to having to take guys like Kyle Snyder and Jason Johnson off of waivers. Yeah the Yankees took a flier on Sydney Ponson but part of their issues was career year guys (Small and Chacon) last year.

Neither team looks really good right now.