Not baseball, but one of my favorites is an autograph card issued in 2008 by Tristar showing TNA wrestling broadcaster Don West.
Of course I didn't get it because of his association with rasslin', but because of his prior incarnation as the over-the-top sports memorabilia pitchman at Shop At Home. I just found it ironic that a guy who used to push the stuff now had a signed card of his own.

Just to add to the silliness, the signed card was also issued in a numbered color variant, and in one-of-one printing plates.

Verifying on another one!