The signed business card came out of a mastro auction lot (see link below). I didn't pay very much for the autograph (<$30 as I recall). But, now it would be nice to know who signed it. On the back of the business card, it has "NY Yankees" written on it (by hand using pencil).
I can easily see how a mistake could occur, but I would think that PSA would have noticed this error.
http://www.legendaryauctions.com/Lot...px?lotid=83709