One would think this should be considered a new development or complication of an old injury, I mean he was on the roster so presumably he passed the physicals and now he can't go, so its hard to see how they can't allow LTIR...
A google of the new CBA seems to allow for a team to go over the cap to replace the player, but I couldn't find anything specific about what replacement means exactly. Does a replacement have to come from within the organization first, do they have to promote a farmhand or can they go outside for a body?


