I think the over/under set at 3 is very reasonable. In the period for 2006 to 2008, Ellsbury, Pedroia, Lester, Youkilis, and Papelbon all emerged to hold down regualr spots. That's five. Who will make the grade from 2010-2012? If they are stuck on the bench behind players like Youk or Ellsbury, they don't count.