Upper Deck announced that there are 4 Retail Exclusive Short Print SP cards that were released in this years 2010 UD Baseball set.
Find these retail exclusive SP Cards on eBay below:
Sarah Palin (Wal-Mart Only)
Joe Jackson (Target Only)
Pete Rose (Wal-Mart Only)
Yankees 5 Time Champions (Target Only)
(Jorge Posada, Derek Jeter, Mariano Rivera and Andy Pettitte)
Keep an eye out for those when searching through the 600+ card set.