Arizona fans, get your hands on the best in authentic David Johnson gear from NFLShop.com, the official online store of the NFL. Choose from authentic red, white, or black Nike Cardinals jerseys and show #31 your love this season. Shop a wide selection of t-shirts, hoodies, and other awesome David Johnson and Arizona Cardinals gear as well. The Cardinals have a lot of offensive weapons, and the young running back from Northern Iowa is emerging as one of the most explosive young backs in the league. Show him, your city, and your team some love with awesome Cardinals gear from NFLShop.com.