Kentucky may have one of its most impenetrable defensive units in school history. In addition to future first-round draft pick Deone Walker anchoring the line and a slew of top-notch linebackers roaming the center of the field, the Wildcats feature two of the top 10 cornerbacks in the SEC locking down the secondary in Maxwell Hairston and Jonquis “JQ” Hardaway. According to PFF, Hardaway has an overall defensive rating of 76.1, and Hairston grades out at 72.9, good for 7th and 10th overall in the SEC through the first four games of the season. Texas and Florida are the only other teams with tw…