Collector and businessman Larry Fritsch pulled together a bunch of otherwise hard-to-find fellows as One-Year Winners. 1977 was the first of 3 "OYW" series and its 18 card checklist includes Eddie Gaedel and Chuck "The Rifleman" Connors.
Many OYW stories could also be called "one-game wonders," such as pitchers who made a single impressive appearance or batters who went 3-for-3 and never played again. Bob Thorpe didn't blow anyone away for the Cubs, but he did go 69-44 in the minors.
Against all odds, there's at least one autographed OYW card out there. Mr. Fritsch still offers complete series on his web site and individual cards on eBay, where #5 (and other "commons") cost $2 or $3.