Thanks for the information.
I'm also a computer programmer (broad term I know!), so I'm interested in this from many angles one of which is how to get my data in here (for others) and then to use it from my own site to keep it fresh (from others).
I'll keep doing what I'm doing, but already finding duplicate types listed for some items, and trying not to become too frustrated, and to help out like you said.
Past team rosters are one thing, but also past competitions seem to be neglected (in my interested area) which I'm trying to think about how to correct.
One question, is it best to suggest specific types (football/soccer) ones from the existing types (which seem to be great for NBA, MLB, etc) or to suggest changes to the existing "sports" types?