There was an IR in for this set. Obviously, it was (and honestly, still is) a giant mess. Since there were images and collections, Admin would never remove it fully (especially since it's a listable set*).
I have created a Multi-Sport set (this forum thread is linked to it above), and had the baseball only set removed (after migrating the listed cards over). I also searched ebay listings, both current and completed and was able to add a couple more (a couple with TBA numbers). The baseball and hockey ones with TBA numbers are most likely double-listed. Once we know those correct numbers, we can remove one.
* - There was mention of another set, and another member added an image of the Sandberg one. I found images of those on ebay as well, and they are on photo paper - not cards, and therefore cannot be listed here.
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).