This is a page in a baseball-related book from the early 1920s. I am terrible at deciphering signatures, but I think the bottom one could possibly be Eddie Collins.
It looks similar to examples I can find. What do you think?
And does anyone have any clue who the others could be? I don't immediately recognize any names as players of the era...
To me, they look like:
Walter Sparrow
Teddy Sparrow
Robert ____
John McDonaugh
Joseph B____
Eddie Collins
(Click the photo for bigger resolution.)