Description:Khalil Mack autographed 2017 Oakland Raiders professional model jersey. Nike size 42 Raiders #52 Khalil Mack jersey with proper On Field tagging. Mack signed the jersey in black marker. Signature rates 8/9 out of 10. Includes NFL Auction COA from PSA/DNA (matching serial #ed sticker is affixed to the jersey). Shows no signs of use/wash wear: NM