Ah, we have a winner! Looks like there were at least 3 years of those.
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I've edited the card set name. Now that we know the magazine, maybe someone can get proper scans of the cards. Also, it appears that while this title ran to 1996, only the '93 &'94 issues had cards in them. So there is one more set to add if we can find card backs for the numbers.
The players for the '94 issue are ONeal, Olajuwon, Robinson, Mourning, Jordan, Hardaway, Barkley and Ewing.
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The cards were unnumbered in the '94 issue. The checklist has been added to the oddball section of 1993. https://www.tcdb.com/ViewSet.cfm/sid/366760/