At a live show in Columbus, GA, Seth Rollins 'officially' threw his hat into the quite literal ring as it were, announcing his participation in Phoenix's 30-man melee. As if it was in any doubt.
There seems to be no real rhyme or reason to who can and can't arbitrarily name themselves as competitors for the Rumble. Did R-Truth really need to win that bloody Mixed Match Challenge when he could have just cut a promo declaring himself number 30 instead?