You were no longer allowed to "thumb" the ball. This meant sticking your thumb in side the "head" near the bottom, on top of the ball preventing it from coming out.
Yes, the rules change a little bit every year.
Jim Brown played for Manhasset High School on Long Island, NY Then for the Syracuse University Orangemen.
I am aware of 2 different uniform numbers. I have seen a picture with #76, and the Syracuse roster for 1957 has Jim Brown listed as #56
Yes