Overwatch has had problems with the lack of statistics available tot he general public. For now, they are focusing on developing an archive which casters and fans can use to help themselves. This will be interesting since only casters are made available with on the spot statistics for now.
Developing an API for on the spot stats was the initial priority, developing an indexable archive for them was not. It is no something that is being developed in more detail and is close to done
— Mitch Leslie (@UberShouts) February 23, 2018