Lot of (4) 2003 Leaf Certified Mirror 100-card baseball uncut sheets. Each is blank-backed and the holo cards have two white lines opposite the team logo at bottom which were intended as cutouts for a uniform jersey swatch. Each measures approximately 28x40" and features the likes of Derek Jeter, Ichiro, Don Mattingly, Albert Pujols, Roger Clemens, Edgar Martinez, Alfonso Soriano, Aaron Sele, Roy Halladay, Juan Gonzalez, and many more. These sheets are the only ones of their kind that we're aware of and each has an even greater scarcity, as five cards on the sheet have unfinished backgrounds and are marked with an X from corner to corner, likely indicating that the player was dropped from the set before mass production. 1) 2003 Leaf Certified Mirror Gold 100-card baseball uncut sheet. The Mirror Gold cards were a limited edition serial numbered insert of /25 with the Leaf series. 2) 2003 Leaf Certified Mirror Black 100-Card baseball uncut sheet. The Mirror Black cards were a limited edition premium insert intended to be just 1/1 in the Leaf series, making these a one-of-a-kind find in any form. 3) 2003 Leaf Certified Mirror Red 100-Card baseball uncut sheet. The Mirror Red cards were a limited edition serial numbered insert of /35 with the Leaf series. 4) 2003 Leaf Certified Mirror Blue 100-Card baseball uncut sheet. The Mirror Blue cards were a limited edition insert of /50 with the Leaf series. All are without limitation number.