I was surprised to discover that the last time I updated this series was more than a year ago . I like writing this series, and it's not super work-intensive. But I also try to balance it out, so I'm not running these all the time. Apparently I balanced things out a little too much. As a refresher, this is where I pick a card year or two and find players in that set who had just one card for their whole career. They didn't appear on a multi-player rookie card or in any other major set (I discount minor league issues and sets of that nature). They are true One-Card Wonders. The last time I did this I said I wanted to wrap up the 1970s, so that's what I'm doing now. The last years to finish are 1972, 1973 and 1976. The most surprising year here is 1972. There are just four One-Card Wonders in the 1972 Topps set, which is 787 cards large. Interestingly, two are bunters. #77 - Ron Theobald, Brewers #331 - Stan Swanson, Expos #366 - Jimmy Rosa...
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