They don't need to post openings for a position to open up through attrition. ATL 7ErB is a huge catagory. This bid has 200 Captain openings and 100 surpluses that are senior to most 7ERB pilots so 100 extra A openings after displacements will absolutely cause some ATL 7ERB's to bid off to Captain. The question that can't be answered is how many guys will leave, and then how many the company chooses to back fill. We aren't as short as DTW or NYC, but we aren't exactly fat on pilots either so I'd say some backfilling will occur. Put the bid in if that's what you want and cross your fingers. Good luck! I hope it works out for you.