No theme, just some different cards.

 I keep a pile of different cards on my desk with unique twists on the game.  I try to accumulate a

few with the same theme, but sometimes there are only a few or one of a kind.

I'm always on the lookout for a brand of card I've never seen

This theme is probably on a few cards, but here are two I have

Doesn't look like bubble gum to me

Supply your own caption for this card!

Ron Howard was actually a pretty good athlete

Could this be the bird Randy Johnson hit?

Give me just one at bat.

That tiger looks hungry