The BYU-TV Channel that is being developed (and should officially be released later this summer) will carry LIVE games for the BYU Teams. The channel that is being developed will broadcast anything that is released on the internet and to the channel via dish or cable. I have personally emailed the developers of the BYU-TV channel for the Roku and had it confirmed to me that the only programming that will not be available on the Roku are the movies or programs that are owned by other companies and broadcast with permission (for example, the old Disney movies that play on Sunday night). This article (http://www.byutv.org/seethegood/post/Why-cant-I-watch-this-movie-online.aspx
) explains this.
Even now, with the channel in beta testing, various sports are available. I have seen both softball and baseball games live on my Roku. Once the new football season begins, those games will also be available. In short, the Roku channel for BYU-TV will show every sports game that will be available.
Again, though the official channel will be released later this summer, send me a private message if you are interested in being involved in the beta testing.