At the end of the day you are talking about a guy who is on his way to the hall of fame as a SS who isn't that far removed from his prime (he doesn't turn 31 til after the season), if you are going to take a risk on anyone, he is the one to do it for. The odds that any of Polanco, May, Berrios, Vargas, Kepler ever play at a hall of fame level are so incredibly small that the risk is more than worth it. (I absolutely wouldnt give up Sano or Buxton, the two guys that do project to be potential hall of fame types if all breaks right)