Baltimore: Was third in fewest points allowed, but were mediocre in takeaways (16th) and even worse in sacks (t-27th).
Dallas: New coordinator Rob Ryan is trying all kinds of experiments, including moving Pro Bowl nose tackle Jay Ratliff up and down the line of scrimmage.
Eagles: I'll wait for a season to see how they fare under Juan Castillo before making them my fantasy defense.
Houston: If there's one thing new coordinator Wade Phillips can do it's coach a defense. Former No. 1 overall pick Mario Williams was moved from d-end to linebacker as Phillips installed his 3-4 alignment.