TV Announcers?

Does anyone know an online source to find out what announcers-play-by-play and analyst/analysts-are broadcasting various sporting events over national over-the-air and sports-specific networks? I know that USA Today prints a list for the NFL games during the season but I cannot always get that paper. Why do I want this information? You might call me an announcer junkie. Several years ago, I wanted to be a sportscaster-I no longer want to be-but I am still extremely fascinated with broadcasters , particularly which broadcasters CBS and Fox have working NFL games. I cannot get NFL Sunday Ticket on DirecTV. Any help would be greatly appreciated.