In 1977, Ohio Pepsi teamed up with MSA to create these cool package inserts! Many folks punched out the circular cards from the glove and/or separated the bottom tab from the glove/card. I was fortunate enough to snag these (along with a ton more at the time) from an ebay auction. The others went to fellow traders in various giveaways in the past. Enjoy a blast from the past:
There were 72 cards in the set, but Reggie Jackson and Mike Schmidt had variations of colors for their cards, and so the actual full set is 80 cards. You will notice the Ohio influence given the number of Indians and Reds cards in the set.
Here is a checklist: http://uk.oocities.com/gormanv/checklists/pepsi-77.html