I noticed this while looking through a error box and finding two of these and two Gerald Young cards with identical errors. Possibly a white effect meant for another card. As of now the rarity is unknown as this error to my knowledge I am the first to realize it. Keep in mind I do not consider "no dots", "fish eye", "print defects" etc. errors but this is different. The "Ghost Slash" is identical on all and exactly in the same spots. In addition is identical to the Gerald Young card I will be adding shortly below. Does not appear on any other cards from the set. What makes it a error is the fact that both were corrected (no slash) later on in the production run.

While the 1989 Fleer Randy Johnson is the most notorious of the 1989 Randy Johnson RC errors - both Topps & Upperdeck had their own error competition. The 1989 Upperdeck has both Gruber and Molitor variations.

1989 Topps decided to go with a Leyland front and Randy Johnson back.

1980 Topps Re-visited color varriations. The Junior Moore and Kent Tekulve I have the exact two pictured below. If you notice the Bittner card goes right into the Tekulve making me believe it was a spill such as the black less 1990 Topps shown below.

1990 Topps Black Less Run.