I was able to pick up another card in the 2013 Ultimate Collection. This card is from the Triple Jersey series. It features 3 players, all Heisman Trophy winners, with a jersey swatch from each player.
On this card, which is serial numbered 15 out of a possible 15, Herschel Walker is shown with Bo Jackson, from Auburn and Billy Sims, from the University of Oklahoma.
The card #'s, or letters correspond to the order of the player on the card, from left to right. In this case, JWS is Jackson, Walker and Sims.
Herschel also shares cards with Barry Sanders and Earl Campbell in this set.