Some sign merchandise, some don't. I remember a long time ago I sent Sosa a card to sign and it came back with no autograph at all, the card was destroyed... and a note that said he doesn't sign merchandise. On the other hand, I've sent players of numerous sports/teams and just sent a note card and a self-addressed stamped envelope and asked nicely for an autograph, and they have returned in kind with a glossy photo or a card signed. It all depends on the person. Dan Marino sent me a colored 8x10 glossy signed and personalized.