This is another item that is new to me, although I'm not sure how rare it is in general. These are cards that were produced by Fleer in 2002 to be included as inserts with Wilson Gloves. You got one card from the set inside the box that the glove came in. It is an 11 card set with Kerry Wood being the lone Cubs representative.
As far as how rare these are, I didn't come across many examples of them through a long time searching in the last week. But I'm not sure if that is due to the fact that they are unknown or due to the fact that they are legitimately rare. Now that I know to look for them, we'll see if I see them more often or not. Either way, I'm glad to have the Wood card on the checklist and hopefully in my collection soon.
2002 Fleer Wilson Glove Cards Checklist (11) - Cards are not numbered