I'm the first to chime in with "trading down is a reaction, not a predetermined strategy," but this sure looks like as likely of a draft as any for that to happen. ILB and S are the biggest needs, and most drafniks only list one player each - the Bama boys - as first-round talents. (Some are even debating if Haha is a true 1st rounder or if he'll just benefit from a very weak class.)
If neither is there at #21, Ted might not see enough difference between his 21st ranked player and his 40th and happily grab an extra pick to slide back.