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KC Joyner: Peterson could elevate Cards' D

KC Joyner is extremely bullish on what the presence of rookie cornerback Patrick Peterson could mean to the Arizona defense. Joyner emphasizes his pointInsider by discussing the impact Ronnie Lott had on the great San Francisco teams of the 1980s.

Writes Joyner: It may sound hard to believe given how bad Arizona's pass defense statistics were last year, but the metrics show that the addition of Peterson and an achievable turnaround by former Pro Bowl cornerback Dominique Rodgers-Cromartie could give the Cardinals a truly elite secondary.