I think, for simplicity's sake, we say any player not on a team's roster before or on TDL is ineligible for playoffs, period. Excluding overseas or ncaa prospects. There are no real life examples of players being waived or claimed post deadline i care to put effort into finding, because it would be lose-lose. Team would have to use one of their last recalls to replace said player, and the claiming team wouldnt be able to use them anyways.