The pink Jets cards are a result of the AFC logo bleeding. Interestingly, they bleed horizontally, almost perfectly, through the white bar, like a color strip issue and were found in packs. These are well-known among variation collectors since 1990 as a recurring print defect. A similar defect affects the front of the series two Jets players and Colts players.
Cards such as the OP's typically come from salvaged uncut sheets of 1990 Pro Set (printer's waste) featuring this opaque magenta overprint, most of which have been cut up and inserted in those Rewind Error wax boxes.
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