From a 40-man perspective, there will be plenty of pitchers who can be released/DFA'ed with no fear of anyone picking them up. Kieboom, someone would take a flyer on him.
Strasburg will remain on the 40-man roster for three more years. He'll go on the 60-day DL every spring training so he doesn't take up a spot in season, but there's no DL in the off season roster.