In 1998, ahead of its 10 year anniversary, Upper Deck inserted ballots in its Series One issue for collectors to vote on their favorite players. This 30-card set features the fan favorites from 1989-1999.
These inserts are strikingly similar to an insert from 1998 Upper Deck Series One, and come in three parallels. Double -numbered to 4000; Triple- numbered to 100; and Home Run is a 1 of 1.
Pictured here is the Ken Griffey jr. Team Triple variation, numbered to 100 and graded BGS 9.