Which would you rather do?
A. Keep Rasmus, Stroman and Sanchez and sign Garza or Tanaka (good but not ace caliber starter at ~ 15MM per)
B. Trade Rasmus plus one of Stoman or Sanchez plus maybe Janssen for a higher level pitcher (eg. Price, Sale) and sign Choo or Ellsbury as a free agent
B makes the team better in 2014 than A does, BUT it costs you a top pitching prospect and costs more $$