Autograph Format Sticker or Label. 2020-21 UD Black Diamond Wayne Gretzky Retired Numbers Patches Auto Gold #2/9.2020-21 UD Black Diamond Retired Numbers Patches Auto Gold Wayne Gretzky. The item 2020-21 UD Black Diamond Wayne Gretzky Retired Numbers Patches Auto Gold #2/9 is in sale since Tuesday, June 15, 2021.