Alan...
I spent a lot of hours playing those dice games (though I was more of an APBA guy).
At one time, Beckett had a quarterly magazine called "Beckett Elite" and in the Spring of 2007 (with his HOF Induction right around the corner) they placed Cal Ripken Jr. on the cover.
They made eight printing plates of the cover and had Cal sign each one..I was able to acquire plate 8 of 8 :
