User blog comment:Rassilon of Old/Young Justice spoilers at Comic-Con 2012/@comment-3094698-20120717195213/@comment-1038387-20120717195924

That's what I've been saying all of season one. But they've found a place for him.

Maybe Sportsmaster's feeling the years? He is 60, after all. Also, I think he would look straight through Artemis's disguise.