Our Roku saves us over $1000 a year. We cancelled DirecTv, and subscribed to Hulu Plus and Netflix streaming.
We also subscribe to MLB-TV so we can watch Red Sox baseball from PA, which costs 1/2 of what it cost to get the same thing on DirecTv.
Before I cancelled DirecTv, I went to the MLB-TV site to make sure I could subscribe to it via Roku, and subscribed through that site.
So if you are interested in another sport, such as football, you can go to the website(s) that handle the games to check it out.
We cannot view blacked-out games, but we can listen to them with the MLB-TV subscription.
I think, but I'm not totally sure, that we can watch any baseball game rerun ... but my men insist on seeing the games live, so they haven't tried that.