Showdown Stars
There are 6 cards in the 2003 NFL Showdown Stars promo set. This set can be distinguished from the League set by the placement of the "Showdown Stars" on the left side of the card and the numbering not beginning with an "L". (As an eBay Partner, I may be compensated if you make a purchase) (eBay Link)
1- Brian Urlacher
Images courtesy of COMC.com
2- Curtis Martin
3- Ladainian Tomlinson
4- Shaun Alexander