The Cardinals are now covered on cornerback depth, and should have no problem with the unwritten rules.
Actually, they signed their backup cornerback Bryan McCann, not Brian McCann, the preachy baseball catcher who thinks its his job to teach us all the right way to play the game.
The McCann the Cardinals announced a one-year deal with today is a special teamer, who adds depth a knowledge of the system.
And as best we know, no one wanted to take a bat to him for selling his principles to the Yankees this offseason.