Think of guys who you don’t want to trade...that’s who it would take.
Nobody’s gonna be over the moon about taking JB, Hooker, Walker, Lewis, Wilson, etc. Those last two would essentially be the equivalent of a late round pick.
AC is expendable, there are lots of options in FA. Pick one that's available, I don't think AC is as dominating as the young OLs we have. Besides, AC is up there in age, he's using this negotiating tool of retirement as an excuse to get a better deal. Next man up!