Nate MacKinnon Signed Colorado Avalanche Red Jersey 2014 Calder JSA 43453 The number in the listing title is just an inventory sku for our records and is not the authentication number. The item pictured is a stock photo unless otherwise noted. This is a Colorado Avalanche Red Jersey that was personally autographed by Nathan MacKinnon with "2014 Calder" inscription. Includes a certificate of authenticity from James Spence Authentication (JSA) and Denver Autographs.