Most of these were collected by my uncle. They are mainly from the early 1950's and were products of Acme NewsPictures (NEA Service Inc., Cleveland). I'm not sure of the date for some: most were marked with at least the month and day.
Cleveland Indians, 1951
New York Yankees, 1951 (mostly World Series)
Others: including: McKechnie, Hornsby, Landis, Durocher, The Dodgers, Foxx, Paige, Campanella
Cleveland Browns
Others (Gherke, Waterfield, Trippi, etc)