honestly I think alot of times they just bring in women to sports cast b/c they want to seem diversified...
Im not a big fan I think you need to have either first hand knowledge or a great deal of knowledge and ive yet to see one female sports caster thats is on the sidelines that does.
Some of the chick they have on espn seem to the brunette on NFL live I think and the little cute one on sports nation or whatever.