BCsMightyJoeYoung said:- In that scenario Napoli leaves and Hanley moves to 1B - the 2016 OF is Betts/JBJ/Castillo. That would be the best defensive outfield the Red Sox (Rice/Lynn/Evans notwithstanding - can't comment on Duffy/Speaker/Hooper although reputation has it they were outstanding) have ever had - and probably the best in baseball.
Probably fodder for its own thread, but why does it seem to be a given that a Betts/JBJ/Castillo outfield would be stellar defensively? JBJ's defensive prowess is unquestioned, but Betts is a converted infielder and Castillo hasn't really had a chance to demonstrate anything good or bad. I guess the assumption is speed = good defense? They may cover a great deal of ground, but I'm not sure I'd put them above some relatively recent combos like Ellsbury/Crisp/Drew and even the ultra short-lived Ellsbury/Cameron/Drew.