It is a tricky situation for the Yanks.
As they brought up in last night's beatdown, ideally we would start Tanaka in the WC game and have Sevy and Happ ready to face the sox.
While that plan does make some sense to me and Tanaka has been pretty good in the 2nd half as well as a solid play off performer, I always worry about his tendency to let up the HR, especially if that game is in Yankee Stadium.