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After a disappointing first-round exit in the 2010 playoffs, Andy Reid promoted long-time offensive line coach and friend, Juan Castillo, to defensive coordinator. Castillo had been itching for a chance to take a defensive coaching position and finally got his break when the passing of the beloved Jim Johnson and inadequate replacements left a vacancy in the defensive coordinator position, and Andy Reid was able to find an adequate replacement offensive line coach in Howard Mudd.
Castillo has the luxury of commanding an incredibly talented defense, including a loaded secondary featuring three bonafide pro-bowlers in Asante Samuel, Dominique Rodgers-Chromartie, and Nnamdi Asomugha, along with a defensive line highlighted by pro bowl defensive ends Jason Babin and Trent Cole.
The new defensive coordinator's biggest challenge will be effectively utilizing all of the talent on his squad by running schemes and plays designed to get the absolute most out of each player. Only then will the defense be able to reach its lofty potential as a unit. Each player must be incorporated seamlessly into the scheme, and with the amount of talent at his fingertips, Castillo will have a multitude of options when calling plays on Sunday afternoon.
Week one will be Castillo's first opportunity to control the defense in a meaningful game. If he executes an effective game plan and stifles an up-and-coming St. Louis offense, Castillo could set the tone for the rest of the season for a defense with soaring aspirations.