I have a confessions to make: I don't understand the rules of (American) Football. To me it's a bunch of guys in tight pants (no complaints) running around for a few minutes then standing around and doing nothing for twice as long. Pretty boring, if you ask me.
The interesting sub-text of this photo is that it was taken at a time when desegregation of college football was still a hot issue. There is an excellent HBO documentary on the subject, Breaking The Huddle.