When Mike Fruitman, owner of Mike’s Stadium Sportscards in Aurora, Colo., contacted Panini America in late November to tell us he was conducting a signing with Colorado cult hero Chris “Birdman” Andersen of the Denver Nuggets, we were only too happy to help. Come on, Andersen stands 6-10, weighs 228 pounds and sports more colorful tattoos than a whole season’s…