Featured autograph - Brooks Robinson

I was thumbing through '2 for $1' old school / vintage bins of a seller I stumbled upon at a card show - I thought this might be just another card, but took a closer look and it looked like it was faintly scribbled on.

It looks like an autograph of Robinson, who passed away on Sept. 26 - maybe it's a testament of how generous he was about signing, where I might find an autograph card of his in a relatively unlikely place.