With the Andre Dawson set at 9 cards, I also wonder if this one is 9 cards too. Makes me wonder if the set was distributed with 9-pocket pages as a unlicensed promotion.
The back of the Strawberry card is pure nonsense scribble from one I saw on ebay. There doesn't seem to be a rhyme or reason to the backs (Mattingly has a story, Ozzie Smith has another photo). Stats are all zeroed out.
My other thought is these were test cards of sorts and weren't intended to hit the market but various players leaked. Perhaps only the Dawson set was officially released.