The front shows Armas in action, although not in Toronto, tracking a fly ball. Couldn't they find a picture from the game?
The game was a lopsided affair with the A's winning 8-1 behind the fielding dependent pitching of Rick Langford. With only one strikeout and no double plays, 26 balls in play were converted to outs by A's defenders as Langford tossed a complete game against a predominately lefthanded lineup. In addition to his busy day in the field, Armas had a walk, single, triple and an RBI at the plate.
My childhood memory doesn't particularly remember Armas for his defense. I remember him as an injury prone slugger. However Armas does score high in the Fangraphs metrics for fielding runs above replacement. I don't always put a lot of credence into newer fielding metrics but I can't ignore that it has Armas at +21, +15, +16 from 1980-82.
So take from it what you will. Perhaps another agile RF would have been able to track down all those fly balls. With a contact pitcher throwing to a lineup with seven lefties, all the stars were lined up just right for Armas' feat immortalized here on card #1.