Jumpin' Jack Kelly was a Grand Rapids guy who could fly and dunk. He became a Macker dunk legend. Tall, gangly and bearded he thrilled many in Macker dunk contests throughout the 1980s. He is best known for winning the ultimate dunk championship in Belding, which offered a $10,000 cash prize. He will still show up at a Macker tournament now again, though his dunking days are in the past.