This is NOT a reproduced autograph. Michael jordan signed autographed 30x40 photo 1988 gatorade slam dunk bulls uda the relationship allows us to provide you a robust catalog of the greatest memorabilia being produced today. But an event that helped put Michael's indelible mark on the sport occurred in 1988 when he captivated the hometown crowd in Chicago during the NBA's Annual Gatorade Slam-Dunk Contest.