It’s asking a lot of him to step in and immediately serve as Arizona’s top cornerback, especially given that the Cardinals might have realistically expected to start the season with Peterson and Alford on the outside while starting Murphy off in the slot. If he can turn into the No. 2 corner Arizona has long sought across from Peterson and do so by the end of the season, it would be a revelation.

For all of the preseason, Murphy has been listed behind Peterson on the depth chart at one of the corner spots. He missed the preseason opener against the Los Angeles Chargers and started at nickelback with Peterson and Brock at the main corner spots in Week 2 against the Oakland Raiders.