BAKER MAYFIELD AUTOGRAPHED 1/1 KABOOM. You are looking at a TRUE ONE OF A KIND Baker Mayfield autographed rookie card! Signed by Baker Mayfield himself, Stamped by Panini with the 2018 Recollection Collection Stamp to Authenticate it and then sealed. There is only 1 to exist! There are many rookie PSA 10 Baker Mayfield Kaboom […]