http://www.nfl.com/news/story/0ap20...son-richard-sherman-isnt-true-shutdown-corner Patrick Peterson: Sherman not a shutdown corner Richard Sherman is never one to back down in a war of words. Enter Patrick Peterson. The Arizona Cardinals star didn't hold back Thursday when asked about Sherman's claims that he's the NFL's best cornerback. "I don't want to get in a debate as far as stats that he has and things like that," Peterson said during an interview on KMVP-FM. "Obviously his job is definitely much easier than mine. But if you look at their scheme and at our scheme, he's a Cover 3 corner. Period. "A lot of guys say he's a shutdown corner. But if you look at film and guys who understand the game, go back and look at film and see how his defense is. I believe that if you put him in our system, I don't believe he'll be able to last, honestly. Because I actually do much more than he is (doing)."