Sean Keeler: Sexy Rexy! In just two years, the Broncos could be transitioning from grumpy, boring guys who practice incompletions (“Pencil” Pat Shurmur) at coordinator to one of the best yappers at an NFL lectern since the turn of the century (Rex Ryan). Pinch me! Oh, and some of Ryan’s defenses in Baltimore, New York and Buffalo were pretty nasty, too, back in the day. Hey, Rexy is a party, good . . .