To play devil's advocate, I have read an interesting definition of sports (and I am searching for a link) that basically said a sport is an athletic competition in which the results are measurable and the method of measuring is easily repeatable.
This would mean things like track & field, swimming, weightlifting, and other competitions based on time or distance are sports.
Football, baseball, basketball, etc. are all just games, since the competition is always different you can never directly compare the results from two different games.
I'm not saying I agree, but it was an interesting point.