The 30-year old Johnson has teamed with young stars Tyrann Mathieu and Patrick Peterson for the last few years, forming one of the best defensive secondaries in all of football. Johnson was drafted in the third round out of Alabama in the 2009 NFL Draft and has spent his entire career with the Cardinals, logging 344 tackles and 15 interceptions.
Five of those fifteen picks were made last season alone, so we know Johnson has plenty left in the tank and isn't slowing down. He is a crafty veteran and would be a sure force for the Raiders should they lure him to Oakland with the promise of untold riches and fame.
The 5'11", 204-pound Johnson can still play, but the Cardinals defense is so crowded with top players they have little choice but to let him walk. He could be a steal at this point in his career.