The product is a Mark McGwire signed official MLB baseball with the inscription BIG MAC. The autograph is authenticated by James Spence Authentication (JSA) and the item is an original piece. This collectible item is a piece of sports memorabilia from the St. Louis Cardinals, showcasing the signature of one of the team’s legendary players, Mark McGwire. It is a unique and valuable item for fans of baseball and autographed memorabilia. See photos for exact condition.