Question though as I'm far from a salary capologist...if the Saints agree to trade for Adams, let's say for a 4th and the Raiders eat enough of the remaining salary to get it to the $2.5 million they have remaining. If they did that, then they wouldn't need to mess with AK's contract. That would be doable, no?
Every time a player under contact goes on IR the team still has to pay him and whoever takes that roster spot so there is an additional cap hit when that happens. 2.5M just might not be enough depending on when in the season that happens.