Signed Vintage MLB 1950’s Baseball with over a dozen signatures - what is it?

[MnBoy2022]

I have a vintage National league Spalding baseball from I believe the 1950’s with over a dozen signatures on it. This ball was my grandfather’s until,he passed about 24 years ago. He occupied a nationally known, well respected role in his day and this ball was likely presented to him as a gift from someone in Major League Baseball back in that day. It looks like it may have been a very lightly used game ball and maybe a team signature set, or a special event ball, etc.

Many (10-12) of the signatures are difficult to decipher because of the handwriting, but several others have been identified including:

Andy Pafko
Mickey Owen
Billy Bruton
Sid Hudson
Lou Perini
Dr. Charles Lack

Can anyone help in determining the rest of the signatures and explain what this ball represents and how it came to be signed with these names?

Thank you in advance for any help provided.