Pete Caldera takes a crack at the deals that the Twins and Yankees may discuss, mentioning:

IF Robinson Cano, RHP Phil Hughes, RHP Jeff Karstens and RHP Tyler Clippard for LHP Johan Santana and IF Matt Tolbert.

OF Melky Cabrera, RHP Joba Chamberlain, RHP Jeff Marquez and IF Wilson Betemit for LHP Johan Santana and LHP Glen Perkins.

RHP Ian Kennedy, OF Melky Cabrera, OF Jose Tabata, RHP Ross Ohlendorf and RHP Allan Horne for LHP Johan Santana.

He mentions the third one as unlikely. If Joba, Phil or Cano are needed, it's gonna be a deal breaker for me at this point. Lisa Kennelly and Ed Price report that, "according to a person with knowledge of the trade talks who asked not to be named", Cano and Joba are off limits.

Via Steve and Bryan Hoch.