Dirk Nowitzki Signed SLAM Magazine PSA/DNA Dallas MavericksThank you for checking out our store! We value each and every customer and want you to be happy with the purchase you are making. Up for sale is a SLAM Magazine signed by Dirk Nowitzki of the Dallas Mavericks. The autograph of Dirk on this magazine was authenticated by a team of experts at PSA DNA so you can rest assured you are purchasing the real deal. Wed like to encourage you, our customer, to reach out to us if you come across any questions. We