After taking another look, I came to the following conclusions.
NBA - Last day to declare - August 17
NBA - Date to withdraw - October 6
NCAA - Date to withdraw to retain eligibility - August 3 (or 10 days after combine, whichever is earlier)
Maybe this is right?!?
As the 5 we'd have ¹Wisconsin and ⁴Iowa, and our record against them would be 1-2. The 6 would have Maryland and Michigan State as the 2 and 3 seeds, who we are 0 and 4 against.
Let's win tomorrow and make it a moot point!