Saints at the top of Davante Adams’ wish list [Raiders trade Adams to Jets for conditional 3rd ; Jets paying Adams’ entire remaining salary]

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.
Well, assuming no additional IR guys (i know that's not likely), the 2.5 million would be intact, could they make it work?