David---the SCD Standard Catalog lists that item as a Topps 1980 Sticker prototype. It lists 4 other dual player prototype stickers, none of which I have ever seen. The checklist notes the error of Maury versus Bump. The description says the photos come from earlier covers of SI. It says the evidence that these items are Topps products is anecdotal. Maybe Bob Lemke can weigh in with more.
It maybe similar to this circa 1977 item, which I also have and which also purports to show a well know Red, and may also be or not be a Topps prototype item...with similar type errors
