Reds obviously feel they've got enough fullback cover on the field with JOC (James O'Connor), Stewart and Petaia all capable of dropping back if necessary. Creighton can play there off the bench or flyhalf.
I notice the Reds website no longer has a page with player information, they simply list all the players with a photo, which is shame. I was trying to find details around player heights. Even though most of them wear their platform shoes for those measurements, Grealy looks undersized in what is already quite a small backline. That might not be helping his selection prospects.