Card Identification Forum

http://www.tradingcarddb.com/Subsets.cfm/sid/36908/2001-Ultra---Head-of-the-Class-Player-Worn

The cards that i have seen online are SN100, which matches what the checklist has for this site.  My card does not have the SN100 (Rear scan, bottom right of card) so might this be a promo?

First off all, no disrespect but is this not going to the extreme of what MEM should be? I always presumed it would be part of their on field unifom and/or equipment. Kind of like the event worn hockey stuff I guess, slip a jersey on and off at a bloody golf tourny and it counts. Anyway to the point, could be a possible misprint as well. Especially if it was a foil SN.