Is that a standard sized card? Might be an unlicensed "Broder" card. If that is the case the Database wouldn't include it unless there was some kind of exception handed down from Admin.
Also could be from a magazine publication "Champions For Today" may have been some kind of sports magazine.
I collect: Baseball, Football, Hockey, Mostly Vintage pre1980, My Homie teams - Washington/Baltimore Teams Senators (Twins, Rangers), Expos/Nationals, Redskins, Capitals, Bullets/Wizards - HOFers - Non-sport (mostly TV shows and movies).
My Trade List is very much a work in progress
CaptKirk42s Trading Card Blog Curly W Cards Strive For '65 YouTube klandersen42