The Three Versions Of 1998 Swing For The Fences:
#1 - Regular Cards They Have A Blue, Non Foil Background, With Contest Rules On The Back. Inserted 1 in 2 Packs #2 - Shop Exchange They Have Silver Foil That Kind Of Looks Like Clouds They Were Given Away At The 1998 All Star Game And In Hobby Shops #3 - Upgraded They Have Circular Holo Foil They Were Never Released To The Public
**as per Worthpoint
1998 Pinnacle Performers Swing For The Fences Upgrade Parallel
These Were To Be Used In The 1998 Swing For The Fences Promotion, But That Contest Had To Be Scrapped Due To Pinnacle's Bankruptcy.
The Beckett Almanac says, "The [regular] cards were intended as exchange items for a... game (based upon the NL and AL home run leader in 1998). Pinnacle's bankruptcy in the Fall of 1998, however, wiped away the Upgrade redemption program."
Or Did It? It Appears That A Few Upgraded Sets Were Produced. I Know That At Least 6 Sets Exist