After a couple days of other things, I figured I might as well get the rest of the decades taken care of. We left off with the '80s. The number of cards is actually a little less than the '70s, down to 276 from 297. The number could have been much higher if I included the traded set cards. I included the '70s traded cards, but that's because they came in the same packs as the base cards. The '80s traded cards were a separate set, so I didn't include them.
The Cub with the longest run through the '80 cards would be catcher Jody Davis*. He had cards from 1982 - 1989. But I had to include the * because while the '89 card shows him as a Cub, it also has the little "Now With Braves" label on it.