Everybody knows about the Pac-12's prolific passing offenses, but it's a fairly well-kept secret that they'll be defended by some of the best defensive secondaries in the BCS this fall. Stanford has a dynamic safety duo in Ed Reynolds and Jordan Richards, while Oregon's peerless cornerbacks are led by Ifo Ekpre-Olomu and Terrance Mitchell. At USC, freshman safety Su'a Cravens is already being touted for a place in the Trojans' lineage of excellence at the position from Ronnie Lott to Troy Polamalu.