Couple of caps taken away for Hector Scarone... confirmed on his AUF file here
Argentina v Uruguay 1920-08-08
This was Isabelino Gradin who plays instead. I can't access his file however, I keep getting a "500 Internal Server Error".
Source: 11v11
Scarone is credited with a hat-trick in a game he doesn't play. The hat-trick was scored by Pedro Petrone instead. Germany team here as well.
Source: 11v11