Megalabowl question - transactions

Hi all,

As you know, after week 10 all rosters are locked from making transactions. However, does this also include dropping? I have TY Hilton on my IR. Assuming he returns healthy in a few weeks, will I need to free up a bench spot and get him out of IR now before rosters are locked, or can I wait and drop someone in a future week to get him out of IR?