I'd take Martinez if we find ourselves with another $1M in GAM that's about to expire, and he's willing to take a 75% paycut. Otherwise I think those wages can be better spent on a player without so much risk of his body not keeping up with Red Bull Soccer.
I would take him but Atlanta would have to give up Tyler wolf or a top young prospect, and a combination of some draft picks or international slot to be equal in value to Josef's 3m salary.