I occasionally buy from the Chicago / Sun collection and also a sister company / outlet, Jay Parrino's The Mint (JPTM) which seems to sell more movie / entertainment photos than sporting photos.
My most recent photo from that source is this one. I bought it at the time because it was described as a photo including Happy Felsch (from the "Black Sox" infamy) but others, notably via baseball fever, have identified it as a Robins / Dodgers photo from 1914 / 1915 era with Casey Stengel, left, and Zach Wheat, right:
I've a multitude of Stengel photos but all from either his time with the Yankees in the 1940s / 1950s or on field with the Giants in early 1920s and personally wouldn't have been able to identify him at all here from the later shots.