Well, let's say the sox let them all walk. Just a theory to throw out there. You're looking at replacing a catcher, a 3b/1b and a DH. With all 3 of them being key contributors to your offense. You'd need to get .900OPS AVERAGE out of the 3 guys you replace them with to break even. Putting Lowrie at 3b essentially makes that impossible. AND, you are talking about replacing a position in C that really doesnt have a lot of offense out there.