In my mind you have to do that trade. I am not sure what your scoring categories are, but Cano is a first round talent in any league and Casto is an unproven commodity at this point.
It sounds like you got guys on your roster that you could trade for a lower tier SS that may put up numbers similar to Castro like the guy I am going to ask you to help me with.
Just ask yourself this- would you rather have the stats that Cano and (pick a lower tier SS you can pick up or trade for) or castro and weeks. The later does not excite me all that much, but that is me.
help with my ss question?viewtopic.php?f=26&t=442220