Upper Deck was on a roll in the 90s and 00's . They were on the cutting edge of innovation in the hobby. A standard many in the hobby try to emulate to this day. 2001's Sweet Spot product took things to a new level with its autograph cards. Current players had signed on individual pieces of leather that looked like the sweet spot of a baseball. For stars no longer with us, the sweet spot with their signature was indeed cut out of a baseball and inserted into the card. Memorabilia cards were also part of the chase , and the set also included some rookie cards , which are highly sought after by collectors today. Upper Deck Sweet Spot Joe DiMaggio Signature 2001 Joe Dimaggio Upper Deck Sweet Spot Auto | CardLadder The great Joe DiMaggio signed a few different parallels for the set. While there is one version with just his name, the version seen above, which includes his nickname "Yankee Clipper," is limited to just 150 copies.…