From Sports Collectors Daily (May 5, 2019 by Stephen Laroche)

Origin: https://www.sportscollectorsdaily.com/1988-89-o-pee-chee-hockey-gretzkys-move-hulls-rookie-variations-and-a-counterfeit-case/

On the bottom left border, Roy’s blocker can be spotted with a large red splotch on it or in its proper state of being in blue. You can find both on eBay but the variation is rarely mentioned. [Note: the blue coloration in the bottom left corner of the border is also missing]

Due to the card’s placement on the uncut sheet next to Roy, the Mario Lemieux card [Note: this is card #1] can also exhibit some ink loss on the bottom right border – creating another variation that has not been catalogued as of yet. This is a little tougher to spot than the Roy variant.

How did this occur? Well, it is quite similar to what happened with 1990 Topps Baseball where the sheet featuring the Frank Thomas rookie card had some excess ink getting on to the printing plate during production. This would have been a much smaller ink splotch, but the availability of both variations for each card seems to be somewhat equal and the plate was likely cleaned mid-run.