This 16 inch X 32 inch Big Sig photo of Rob Gronkowski catching a TD in Super Bowl 49 is signed by Gronkowski. Gronk has been a key part to the Patriots offense ever since he was drafted. He has a combination of hands, size and speed that makes him a mismatch for anybody and everybody on the football field. One of Brady's favorite targets, Gronk has been a key part of multiple Super Bowl winning teams. The autograph is authenticated by Steiner Sports.