Five Random Cubs Cards

 I've got 19,214 Cubs cards from 284 different brands listed on a spreadsheet. A random number generator picked five cards, one each from the past several decades.

1900s - 1970s: 1976 Fleer Baseball Firsts #1 Mike Kelley  The set is called Baseball Firsts, and this card recognizes the first slide.  The back of the card says that no one knows who made the first slide.  Kelley is on the card, recognized as the player who came up with several slide variations like the head first slide and sliding away for the base and grabbing it with your hand.

1980s: 1988 Topps Traded #131 Don Zimmer  Popeye was hired to manage the Cubs in 1988 by his childhood pal and Cubs general manager Jim Frey.

1990s: 1999 Action Flats #5 Kerry Wood The scan ruins the logo on the card, the Action Flats logo.

2000s: 2005 Heritage New Age Performer #8 Sammy Sosa I associate the NAP subset with up-and-coming players, not veterans.  Sammy was not new is 2004, he was aged.

2010s: 2013 Team Issued #60 Jose Cardenal This came out eight years before Heritage, but notice how the border color is red just like this year's Heritage and not like the pink on the original 1972 cards.